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9 Best Fasting Supplements | Not All Salt Pills Are the Same

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Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.

Fasting throws your body into a mineral deficit faster than almost any diet. When you stop eating, your kidneys flush out sodium, potassium, and magnesium at a higher rate, and plain water alone cannot put them back. This guide reviews nine electrolyte and mineral supplements designed to prevent dehydration, cramps, and brain fog during intermittent, extended, or ketogenic fasts.

I’m Mohammad Maruf — the founder and writer behind WellFizz. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.

All supplements listed are zero-calorie or very low-calorie to support hydration, muscle function, and energy without breaking a fast. To help you find the right one for your routine, we have curated this list of the best fasting supplements available right now, organized by what matters most to real users.

Our Picks at a Glance

REDMOND Re-Lyte Electrolyte Powder Packets (Lemon Lime) 30ct
Best OverallREDMOND Re-Lyte Electrolyte Powder Packets (Lemon Lime) 30ct4.8★554 ratingsThe crowd-pleasing packet that nails the electrolyte ratio without any sugar. The thing everyone raves about here is the taste — it hits that sour-lemon note with a touch of sweetness from stevia, and it dissolves completely in water.Check Price on Amazon
Youth & Tonic MCT Keto Electrolyte Pills, Fasting Electrolytes & Salts, 120 Ct
Best Capsules for KetoYouth & Tonic MCT Keto Electrolyte Pills, Fasting Electrolytes & Salts, 120 Ct4.5★810 ratingsA capsule powerhouse that packs electrolytes, CoQ10, and probiotics into two small pills.Check Price on Amazon
Liquid I.V. Sugar Free Hydration Electrolytes, Mandarin Orange, 14 Count
Best TastingLiquid I.V. Sugar Free Hydration Electrolytes, Mandarin Orange, 14 Count4.7★606 ratingsThe sugar-free mix that tastes like candy but hydrates like a sports drink. The taste is the star here, with 63 owners calling it out positively.Check Price on Amazon

How To Choose The Best Fasting Supplements

Choosing the right fasting supplement depends on your fasting style, preference for flavored drinks versus pills, and your body’s specific mineral needs.

Form: Powders vs. Capsules

Powders mix into water and usually taste fruity or savory, which makes them a good choice if you need help drinking enough during a fast. Capsules are flavorless and travel-friendly, ideal for anyone who hates sweet drinks or needs precise, repeatable dosing without any taste. Powders need a bottle and mixing; capsules can be taken anywhere without preparation.

Mineral Profile and Ratios

The ideal sodium-to-potassium ratio for fasting is 2:1 or 3:1, matching what the body loses during a fast. Look for formulas that also include magnesium (often as magnesium glycinate for better absorption) and calcium. A broad mineral profile including trace minerals and zinc supports energy and muscle recovery.

Capsule Count and Serving Cost

For extended fasts lasting multiple days, you will need far more capsules per day than for a daily 16:8 intermittent fast. Some brands recommend 12 to 24 capsules daily for extended fasting, which makes cost-per-serving and bottle size a real factor. A 120-count bottle that costs less per pill is better for long fasts, while a smaller packet count works for shorter daily routines.

Quick Comparison

Model Best For Form Key Minerals Servings / Count Amazon
REDMOND Re-Lyte Best Overall Hydration Powder Packets Na 810mg, K 400mg, Mg 50mg 30 packets Amazon
Youth & Tonic MCT Keto Best Capsules for Keto Capsules Na, K, Mg, CoQ10 120 capsules Amazon
Liquid I.V. Sugar Free Best Tasting Electrolyte Mix Powder Packets Na, K, 8 Vitamins 14 packets Amazon
No Sugar Electrolytes Powder Packets Best Unflavored Powder Powder Packets Na 1000mg, K 300mg, Mg 80mg 30 packets Amazon
Ultima Crave Killer Best for Curbing Cravings Powder Packets 6 Key Electrolytes + Chromax 14 stickpacks Amazon
REVIVER Electrolyte Pills Best for Athletes & Runners Capsules 6 Electrolytes + BioPerine 120 capsules Amazon
Nutri-Align Fasting Salts Best for Extended Fasts Capsules Na, K, Mg, Ca 120 capsules Amazon
Santa Cruz Paleo Best Flavor Variety Powder Mg Glycinate, K Chloride 30 servings Amazon
Dr Ekberg euLyte Best Full-Mineral Spectrum Powder 80+ Minerals, Na, K, Ca, Mg 90 servings Amazon

In‑Depth Reviews

★ Best Overall

1. REDMOND Re-Lyte Electrolyte Powder Packets (Lemon Lime) 30ct

Our pick — over 4.5★ from 550+ verified ratings; the strongest balance of quality and price.

No Added SugarHydration Packets

The crowd-pleasing packet that nails the electrolyte ratio without any sugar.

The thing everyone raves about here is the taste — it hits that sour-lemon note with a touch of sweetness from stevia, and it dissolves completely in water. Buyers report it “tastes great, dissolves quickly and thoroughly, and has more potency than other mixes.” That potency comes from a formula delivering 810mg of sodium, 400mg of potassium, and 50mg of magnesium per packet, built around a 2:1 sodium-to-potassium ratio that matches what your body actually loses during a fast. The packets are portable, making them an easy toss into a gym bag or desk drawer.

On hydration, the feedback is loud and clear. Owners say it helps with leg cramps and provides steady energy throughout the day, especially in hot, humid environments. The base salt here is Real Salt, an unrefined sea salt that brings 60-plus trace minerals, so you get more than just the three headline electrolytes. The packet size is 6.88 ounces for 30 servings, which is noticeably heavier than capsule options — but for flavor lovers who want a drink, this is a tough one to beat.

The occasional grumble is about the price when using two packets daily, and the solubility gets a mixed tag from a small group who find it needs a good shake. If you want zero calories, real fruit flavor, and a mineral profile that actually supports fasting, this is the one to keep in rotation.

What Wins People Over

  • Excellent lemon-lime flavor with no artificial aftertaste, praised by 64 owners for its taste
  • High potency formula with 810mg sodium and 400mg potassium per serving
  • Uses unrefined Real Salt with 60+ trace minerals for broader mineral support
  • Portable single-serve packets dissolve completely in water

What to Keep in Mind

  • Cost per serving adds up if you need two packets daily, especially on a carnivore diet
  • Solubility gets mixed feedback — some find it needs extra stirring to fully dissolve

Reach for this if: you want a great-tasting electrolyte drink that delivers a proven 2:1 sodium-to-potassium ratio and real mineral depth from unrefined salt.

Look elsewhere if: you prefer unflavored options, need capsules for travel, or are on a very tight per-serving budget for daily double-dosing.

Best Capsules for Keto

2. Youth & Tonic MCT Keto Electrolyte Pills, Fasting Electrolytes & Salts, 120 Ct

Sugar FreeCapsules

A capsule powerhouse that packs electrolytes, CoQ10, and probiotics into two small pills.

What wins people over here is effectiveness — it is the most-praised aspect, with 67 owners calling it out for delivering real results during keto and fasting. Owners mention it “by far is the best for keto lifestyle, those working out/sweat a lot and those who experience frequent headaches or dizziness.” The formula goes beyond plain salt tablets by including Coenzyme Q10 for cellular energy, a DE111 probiotic strain for digestive balance, plus zinc, calcium, chromium, manganese, and vitamins D3 and B6. Each serving is just two capsules, keeping it simple.

Cramp relief is the second most-discussed benefit, with 33 owners specifically mentioning it helps stop nighttime leg and foot cramps. The capsule size is large but described as soft and tasteless, so swallowing is not an issue. At 4.83 ounces for 120 capsules, the bottle is compact enough to toss in a carry-on. One owner noted a single bottle lasts about four months on a standard two-capsule daily dose, which is a strong value play compared to the 30-count powder packets that cost similar money for a month’s supply.

The main trade-off is that capsules are large — though reviewers consistently say they go down fine. If you want a no-mix, no-taste fasting supplement that also supports regularity and energy through probiotics and CoQ10, this is the one to reach for.

Why It Stands Out

  • Top-rated effectiveness with 67 positive mentions for supporting keto and fasting routines
  • Delivers cramp relief for 33 owners, especially for nighttime leg and foot cramps
  • Includes CoQ10, probiotics, and a broad mineral blend beyond just sodium and potassium
  • Easy two-capsule daily dose with a bottle that lasts roughly four months

A Note on Fit

  • Pill size is large, though most owners find them soft and easy to swallow
  • Not for anyone who prefers flavored drinks or wants the sensory experience of a mixed beverage

Best for: keto and low-carb dieters who want a pill-based solution with extra cellular energy support and digestive probiotics.

Skip if: you have trouble swallowing larger capsules or specifically want a flavored electrolyte drink to encourage water intake.

Best Tasting

3. Liquid I.V. Sugar Free Hydration Electrolytes, Mandarin Orange, 14 Count

Sugar FreePowder Packets

The sugar-free mix that tastes like candy but hydrates like a sports drink.

The taste is the star here, with 63 owners calling it out positively. Buyers describe it as “like biting into a slightly salty orange” — bright, citrusy, and refreshing without any artificial aftertaste. The formula uses Liquid I.V.’s proprietary Amino Acid Allulose Blend, which delivers 3x the electrolytes of a leading sports drink, plus 8 vitamins and nutrients, all with zero sugar and zero artificial sweeteners. Each packet mixes into 16 ounces of water and dissolves cleanly with no grit.

Hydration is the second most-discussed aspect, with 30 owners vouching for its effectiveness after exercise, travel, and even after a night out. The brand’s donation program — over 55 million servings donated since 2015 — adds a feel-good layer. The downside is the packet count: 14 servings per box. For daily use, you will need multiple boxes, which adds up compared to bulk powder tubs. The package is light at 6.41 ounces, making it easy to stash a few packets in a bag.

The occasional note is that the flavor can be strong if not diluted enough, so start with the recommended 16 ounces of water. If you want a sugar-free electrolyte drink that genuinely tastes great and hydrates fast, this is the one to grab.

What Shines

  • Exceptional mandarin orange flavor praised by 63 owners, with no artificial aftertaste
  • Delivers 3x the electrolytes of leading sports drinks with 8 vitamins and nutrients
  • Mixes easily without grit and uses a sugar-free formula with no artificial sweeteners
  • Convenient single-serve packets for travel and post-workout recovery

What to Consider

  • Only 14 packets per box, requiring multiple purchases for daily use
  • Flavor can be overpowering if not diluted with the full 16 ounces of water

Grab this for: the best-tasting sugar-free electrolyte drink on the market, perfect for post-workout hydration or as a daily fasting-friendly beverage.

Think twice if: you need a higher number of servings per package or prefer unflavored electrolyte options for longer fasts.

Best Unflavored Powder

4. No Sugar Electrolytes Powder Packets | Keto & Fasting Salts Drink Mix, 30 Sticks

UnflavoredCalorie Free

The flavorless stick pack that packs a serious mineral punch for strict fasters.

The biggest selling point here is what is not in it — no flavor, no sugar, no carbs, no dairy, no gluten, and no artificial additives. Each stick delivers 1000mg of sodium, 300mg of potassium, and 80mg of magnesium, which is a higher sodium hit than many competitors. Owners who want zero taste say it is exactly what they were looking for. As customers note, it is “literally no taste which is what I wanted! Got me through my work out, easy mix, solid product!”

The unflavored nature makes it versatile — you can mix it into water, juice, or any beverage without altering the taste. The solubility is straightforward, and the 30-stick count gives you a full month’s supply at a price that undercuts many flavored options. The package dimensions are 6.97 x 4.57 x 3.31 inches at 6.74 ounces, making the box easy to store. The honest trade-off is that the natural salt taste is present; some owners find it very salty and strong, especially if not diluted with enough water. A single reviewer noted it sent their blood pressure “to the moon,” though this is an isolated report.

The fit is specific: if you want a powder without any distracting flavor that you can add to anything, this works well. If you dislike any salty taste or want a flavored drinking experience, look elsewhere.

What Works

  • Genuinely flavorless with no sugar, carbs, dairy, gluten, or artificial additives
  • High sodium content at 1000mg per stick, ideal for heavy sweaters and extended fasts
  • 30 sticks per box provide a full month of daily servings
  • Versatile enough to mix with any beverage without altering taste

What to Know

  • The natural salt taste can be strong and overwhelming if not diluted with enough water
  • Not for anyone who enjoys a flavored, sweet, or fruity electrolyte drink experience

Pick this if: you want a completely unflavored, high-sodium electrolyte powder that mixes into anything without adding taste or calories.

Pass if: you want a flavored beverage, dislike any salty aftertaste, or need lower sodium per serving for daily maintenance.

Best for Curbing Cravings

5. Ultima Replenisher Crave Killer Supplement and Electrolytes Powder – Tropical Fusion, 14 Stickpacks

With ChromaxTropical Flavor

An electrolyte drink with a built-in edge against sugar cravings.

The standout feature here is Chromax, a form of chromium picolinate that is clinically associated with helping curb cravings. Combined with passionfruit and orange flavor, this drink targets two problems at once: hydration and appetite control. The flavor is the most-praised aspect, with 159 owners calling it delicious. Owners say it works as advertised: “Great taste. Definite appetite suppressed — drink before coffee. Or after. Set for the day.” Craving relief is the second most-discussed aspect, with 95 mentions, making this a strong pick for anyone using fasting to break sugar habits.

The formula includes six key electrolytes — magnesium, calcium, potassium, chloride, phosphorus, and sodium — plus ginger root extract. It has zero sugar, zero calories, and zero carbs, and is gluten-free, vegan, and keto-friendly. The stickpacks are convenient at 2.4 ounces per 14-count box. The hydration feedback is solid, with 32 owners praising it for keeping them hydrated, especially breastfeeding mothers who found it helpful.

The honest note is that the value-for-money rating is mixed, with some finding it pricey for 14 servings. A small number of owners also report stomach effects like nausea. The recurring gripe is that the craving-reduction effect varies — some feel it strongly, others say it is subtle. This one is a great fit if you want an electrolyte drink that also takes the edge off hunger pangs during a fast.

Why It Excels

  • Includes Chromax to help curb sugar cravings, with 95 owners praising its effectiveness
  • Excellent tropical fusion flavor with 159 positive mentions for taste
  • Zero sugar, zero calories, zero carbs, and free from artificial sweeteners
  • Provides six key electrolytes plus ginger root extract for digestive support

What to Weigh

  • Only 14 stickpacks per box, making it less economical for daily use
  • Some reviewers point out mild stomach effects like nausea
  • Cravings reduction varies by individual — not a guaranteed appetite suppressant for everyone

Best for: fasters who struggle with sugar cravings and want a tasty, electrolyte-rich drink that also helps curb appetite.

Skip if: you have a sensitive stomach, need a higher serving count per package, or do not struggle with cravings during fasts.

Best for Athletes

6. REVIVER Superior Absorption Electrolyte Pills – Salt Tablets for Runners, 120 Capsules

With BioPerine6 Electrolytes

A lab-tested capsule with a smart-absorption edge for endurance and heat.

Digestibility is the most-praised aspect here, with 116 owners calling it out. That is unusual for a supplement category where taste usually dominates — but REVIVER’s inclusion of BioPerine (a black pepper extract that boosts nutrient absorption) makes the minerals more usable, and owners notice the difference. The formula covers all six essential electrolytes plus sodium bicarbonate and vitamins, with no caffeine. Shoppers say it “has a better mix of salt and electrolytes than many of the other electrolyte supplement capsules.” Effectiveness is the second most-discussed aspect, with 112 positive mentions.

The real-world stories are striking. One owner tested it on a group during a heavy drinking session — the four who did not take it had crippling hangovers, while those who took it felt fine. Others use it to prevent cramping during tennis in 100-degree heat, taking one tablet before play, one after the first hour, one after finishing, plus lots of water. The bottle is 5.61 ounces for 120 capsules, and the product has been around since January 2017, giving it a long track record. The label “Superior Absorption” is backed by the BioPerine ingredient, not just marketing.

The honest trade-off is that the capsules are not flavored, so you will not get a tasty drink experience. Also, the high sodium content might be too much for someone not sweating heavily or doing intense exercise. If you are an athlete, a heavy sweater, or someone who needs electrolytes that actually get absorbed, this is the one.

What Makes It Different

  • Top-rated for digestibility with 116 positive mentions, aided by BioPerine absorption enhancer
  • Includes all six essential electrolytes plus sodium bicarbonate and vitamins
  • Extensive real-world use for endurance sports, heat, and hangover prevention
  • Lab-tested, manufactured in a cGMP-certified facility with no proprietary blends

Considerations

  • No flavor — these are plain capsules, not a drink mix
  • High sodium content may be excessive for light activity or daily maintenance without heavy sweating

Reach for this if: you are an endurance athlete, runner, or heavy sweater who needs highly absorbable electrolyte capsules for intense activity or heat.

Look elsewhere if: you prefer flavored electrolyte drinks, or your activity level is light and you just need basic daily electrolyte maintenance.

Best for Extended Fasts

7. Nutri-Align Fasting Salts Fasting Electrolytes, 120 Capsules

Fasting RatiosFiller Free

A pure salt capsule calibrated specifically for extended water fasts.

This one was designed from the ground up for fasting, not general hydration. The sodium, potassium, and magnesium ratios are calibrated specifically for extended and intermittent fasting, removing the guesswork of mixing separate supplements. Owners confirm this works: “Really helped keep my electrolytes up while I did a 5 day fast. Completed it with my husband who didn’t take the fasting salts and I really think it helped me handle it much better than him.” Another owner completed a 7-day water fast with “minimum symptoms.” Effectiveness is the most-praised aspect with 16 positive mentions, and fasting benefits follow at 12.

The formula is remarkably clean: the only ingredients are pure electrolyte salts and a small amount of calcium carbonate used as a bulking agent for machine encapsulation. There are zero flavorings, sugars, sweeteners, gluten, or soy. The manufacturer holds FDA-registered, GMP, BS EN ISO 9001, and HACCP certifications, and the capsules are Halal-certified and suitable for vegetarians. With 120 capsules per pack, the recommended dosing varies by fasting style — 12 to 24 capsules daily for extended fasting, 3 for intermittent fasting, and 1 to 2 for keto maintenance.

The honest downside is that the capsule quality has occasional issues. A few buyers report capsules leaking powder into the bottle due to poor sealing. Some also mention mild stomach discomfort when taking them on an empty stomach, though they say the effects are fast-acting and provide “100% relief.” If you are planning a multi-day water fast and want a clean, purpose-built electrolyte capsule, this is your pick.

What It Does Best

  • Ratios calibrated specifically for extended and intermittent fasting, not general hydration
  • Pure electrolyte salts with zero flavorings, sugars, sweeteners, gluten, or soy
  • Proven in real use — owners completed 5-day and 7-day water fasts with minimal symptoms
  • Multiple quality certifications including GMP, ISO 9001, and HACCP

Potential Issues

  • Some capsules may leak powder into the bottle due to sealing inconsistencies
  • Can cause mild stomach discomfort on an empty stomach for some users

Best for: anyone doing multi-day water fasts who wants a no-junk, purpose-formulated electrolyte capsule with proven real-world results.

Skip if: you prefer flavored drinks, have a sensitive stomach that reacts to concentrated salt on an empty stomach, or need a lower daily capsule count.

Best Flavor Variety

8. Santa Cruz Paleo Electrolyte Powder, Dragon Fruit Flavor, 30 Servings

Magnesium GlycinateStevia Sweetened

A colorful electrolyte powder with real magnesium glycinate and 12 flavor options.

Taste is the biggest draw here, with 172 owners praising it — making it the most-praised aspect by a wide margin. The dragon fruit flavor is described as “light, refreshing, not overly sweet, no artificial aftertaste.” Unlike many competitors, Santa Cruz Paleo uses magnesium glycinate (a highly absorbable form of magnesium that is gentle on the stomach) and potassium chloride, alongside a blend of Himalayan pink salt and sea salt. The formula has no added sugar, no artificial sweeteners, no fillers, and is free from magnesium stearate, sucralose, and aspartame.

The quality aspect scores 77 positive mentions, with owners calling the ingredients clean and effective for hydration after hot yoga classes and workouts. The 30-serving tub is compact at 2.83 x 2.72 x 2.32 inches and 5.61 ounces, making it easy to store. The brand offers a rainbow of flavors beyond dragon fruit — prickly pear, lemonade, lychee, orange, lemon lime, mango, kiwi, peach, kiwi lemonade, honeydew melon, and starfruit — so if you get bored easily, this is the brand to explore.

The value-for-money rating is mixed, with some owners finding it pricey for 30 servings. The scoop size is small, and one owner noted the tub lasts about 3 weeks to a month with daily use. If you want a great-tasting, clean electrolyte powder that uses premium magnesium, this is a solid pick.

Why Owners Love It

  • Outstanding dragon fruit flavor with 172 positive taste mentions, no artificial aftertaste
  • Uses magnesium glycinate and potassium chloride for superior absorption and gentleness
  • Clean ingredients with no added sugar, artificial sweeteners, or fillers
  • Available in 12 different flavors to prevent taste fatigue

What to Watch

  • Value perception is mixed — some find it pricey for 30 servings
  • Tub size is small; daily users may need to reorder every 3-4 weeks

Grab this for: the best-tasting electrolyte powder with premium magnesium glycinate and 12 flavor options to keep you from getting bored.

Think twice if: you are on a tight per-serving budget, need capsules instead of powder, or prefer unflavored options.

Best Full-Mineral Spectrum

9. Dr Ekberg euLyte Instant Hydration Electrolytes Powder, Lemon Lime, 90 Servings

80+ Minerals90 Servings

The 90-serving tub with 80-plus minerals and a doctor-developed formula.

The sheer depth of mineral content sets this apart. Where most electrolyte powders focus on sodium, potassium, and magnesium, euLyte delivers 80-plus essential electrolytes and trace minerals — including manganese, zinc, and a full spectrum of trace minerals — plus magnesium, calcium, sodium, chloride, and potassium. Developed by Olympic decathlete and doctor Dr. Sten Ekberg, the formula is designed to support not just hydration but also autophagy during extended fasts. Taste is the most-praised aspect with 134 positive mentions, and owners say it is a pleasant lemon-lime flavor that is “light, not overly fake, not too salty.” Quality follows with 74 positive mentions, and owners consistently note it dissolves fully with no grit.

The value proposition is strong: 90 servings per container at 1.32 pounds, with a cost per serving that undercuts many premium competitors. One owner compared it to Dr. Berg’s formula and said euLyte won on both flavor and texture — fully dissolving without any grit. The formula is free from cheap fillers, sugar, table salt, dyes, GMOs, soy, egg, corn, dairy, nuts, yeast, caffeine, gluten, and artificial sweeteners. It is also third-party tested on every batch. The dosing is flexible: 1 scoop daily for maintenance, 2 to 4 scoops during extended fasting.

The honest caveat is the container design. Owners note the tall, narrow container with a short-handled measuring scoop makes it hard to reach the powder when the tub gets low. It is the most expensive single bottle on this list, but the 90-serving count brings the per-serving cost down nicely. If you want a comprehensive mineral profile and a long-lasting tub, this is the winner.

What Makes It Exceptional

  • 80-plus essential electrolytes and trace minerals including manganese and zinc
  • Developed by an Olympic decathlete and doctor with a focus on fasting and autophagy support
  • Excellent lemon-lime flavor with 134 positive taste mentions and no grit
  • 90 servings per tub with a competitive per-serving cost versus premium competitors

Practical Notes

  • Tall, narrow container makes scooping difficult when powder level gets low
  • Higher upfront cost, though per-serving cost is reasonable for the mineral depth

Best for: serious fasters and health-conscious users who want the broadest mineral spectrum available in a single, great-tasting powder.

Consider alternatives if: you want capsules, have a tight budget for the initial purchase, or dislike tall containers that are awkward to scoop from.

Understanding the Specs

Sodium-to-Potassium Ratio

This is the single most important metric for a fasting electrolyte supplement. Your body loses sodium at a much higher rate than potassium during a fast, so a ratio around 2:1 or 3:1 sodium-to-potassium is ideal. A supplement with too much potassium relative to sodium can cause imbalance, while too much sodium without enough potassium may not support proper cellular function. Check the label numbers, not just the marketing claims — the exact milligrams tell you the real ratio.

Magnesium Form

Not all magnesium is absorbed the same way. Magnesium glycinate, used by Santa Cruz Paleo, is bonded to the amino acid glycine and is known for being gentle on the stomach with high bioavailability. Magnesium oxide is cheaper but less absorbable. If you have a sensitive stomach or want the most usable magnesium, look for “magnesium glycinate” or “magnesium citrate” on the ingredient list rather than just “magnesium.”

FAQ

Will these supplements break my fast?
All the supplements listed here are designed to be zero-calorie or very low-calorie and should not break a fast. Powders like REDMOND Re-Lyte and Liquid I.V. Sugar Free contain zero calories per serving. Capsules like Youth & Tonic and REVIVER have no sugar, no carbs, and no calories. Always check the label for any hidden sugars or fillers, but the products on this list are all fasting-safe.
How many electrolyte capsules do I need per day during a fast?
It depends on the type of fast. For intermittent fasting (16:8), Nutri-Align recommends 3 capsules per day. For extended fasting lasting multiple days, they recommend 12 to 24 capsules daily. Youth & Tonic suggests 2 capsules per day, with 1 extra on heavy-sweat days. Start with the low end of the recommended range and adjust based on how you feel — headache, fatigue, or cramping mean you likely need more.
Are powder packets or capsules better for fasting?
Each has a clear advantage. Powder packets are better if you need help drinking more water during a fast — the flavor encourages you to hydrate. Capsules are better if you dislike sweet drinks, want zero taste, or need to travel light. For extended fasts, capsules are often more practical because you can take many servings without drinking large volumes of liquid. There is no wrong choice; it depends on your personal routine.
What is the ideal sodium-to-potassium ratio for fasting?
Most experts recommend a 2:1 or 3:1 sodium-to-potassium ratio during a fast. For example, REDMOND Re-Lyte delivers 810mg of sodium and 400mg of potassium, which is roughly a 2:1 ratio. This matches the proportion of electrolytes your body loses through urine when you are not eating. Avoid supplements with equal amounts of sodium and potassium or those that have more potassium than sodium.
Can I take these supplements on a keto or carnivore diet?
Yes. Most of these products are explicitly marketed for keto and carnivore diets. Youth & Tonic is designed for keto and includes MCT for fast carb-free fuel. No Sugar Electrolytes and Nutri-Align are keto-friendly with zero carbs. Santa Cruz Paleo is gluten-free, dairy-free, and free from artificial additives, making it suitable for both keto and carnivore. Just avoid any supplement with added sugars or fruit juice concentrates.
How long does a 120-capsule bottle last?
It varies by daily dose. Youth & Tonic recommends 2 capsules per day, so a 120-count bottle lasts roughly 60 days about two months. Nutri-Align recommends 3 capsules for intermittent fasting (40 days per bottle) or 12-24 for extended fasting (5 to 10 days). REVIVER also recommends 2 capsules daily for maintenance, giving about 60 days. Always check the recommended dose on the label for your specific fasting protocol.
Is it safe to take electrolyte supplements every day?
For most people, daily electrolyte supplementation is safe when taken as directed. The products here use food-grade mineral salts in amounts that mimic what you lose through normal bodily functions during a fast or low-carb diet. If you have high blood pressure, kidney issues, or are on medication that affects electrolyte balance, consult a healthcare professional before starting any new supplement. Stay within the recommended daily serving size.
What is BioPerine and why does it matter in electrolyte pills?
BioPerine is a patented form of black pepper extract (piperine) that increases the absorption of certain nutrients. REVIVER includes it in its formula to help your body absorb the electrolytes more efficiently. Owners consistently praise the digestibility of REVIVER’s pills, with 116 positive mentions, suggesting the BioPerine does make a difference. It is an uncommon but valuable addition to an electrolyte supplement.
Can I use these supplements for hangover prevention or recovery?
Many owners mention using electrolyte supplements for hangover prevention and recovery. REVIVER has specific owner reports of a group test where those who took it before drinking avoided hangovers while those who skipped it did not. Liquid I.V. Sugar Free owners say it works wonders after a night out. The mechanism is straightforward: alcohol dehydrates you and depletes electrolytes, and replenishing them helps your body recover faster.

Final Thoughts: The Verdict

If you want one dependable pick, the best fasting supplements winner is the REDMOND Re-Lyte because it nails the taste, the electrolyte ratio, and the mineral depth in a convenient packet format that real owners consistently love. If you want the convenience of capsules with added CoQ10 and probiotics, grab the Youth & Tonic MCT Keto Electrolyte Pills. And for extended water fasts where pure, purpose-formulated electrolytes matter most, the Nutri-Align Fasting Salts is the one to reach for. Whichever form fits your fasting style, having your electrolyte strategy locked in before you start makes the difference between a miserable fast and a successful one.

How We Picked

We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.

Sources & Methodology

Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of July 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.

As an Amazon Associate, WellFizz earns from qualifying purchases. This does not affect which products we feature.

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Mo Maruf
Founder & Lead Editor

Mo Maruf

I created WellFizz to bridge the gap between vague wellness advice and actionable solutions. My mission is simple: to decode the research and give you practical tools you can actually use.

Beyond the data, I am a passionate traveler. I believe that stepping away from the screen to explore new environments is essential for mental clarity and physical vitality.

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