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The hardest part of intermittent fasting is rarely the hunger — it’s the headache, the fatigue, and the muscle cramps that roll in by hour 16. Those symptoms are usually a sign your body is short on electrolytes (the minerals that carry electrical signals through your body), not calories. This guide sorts through the sugar-free, zero-calorie hydration mixes that let you stay on track without breaking your fast.
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.
Find the cleanest mix for your fast, with zero sugar and zero calories, so your body gets the minerals it needs without spiking insulin. electrolytes for intermittent fasting work best when they’re pure, portable, and fast-dissolving — and these nine picks all fit that bill.
Our Picks at a Glance
How To Choose The Best Electrolytes For Intermittent Fasting
When you’re fasting, your body flushes out water and minerals faster than usual through urine. That’s why a plain glass of water isn’t always enough. The right mix replaces lost minerals with zero calories, so your fasted state stays intact.
Check the Sweetener First
Zero sugar doesn’t automatically mean zero calories. Some brands use artificial sweeteners like aspartame or sucralose, which can trigger an insulin response in some people. For fasting, you want stevia or monk fruit — natural, plant-based sweeteners with no calories and no glycemic impact.
Sodium Is Your Friend, Not Your Enemy
Most people are conditioned to avoid salt, but during a fast, sodium is the single most important mineral you’re losing. It’s what keeps your blood pressure stable and prevents that light-headed feeling when you stand up too fast. Look for a mix that lists sodium as a primary ingredient, not an afterthought.
Match the Format to Your Life
Electrolytes come as powders, sticks, and tablets. Powders in bulk tubs are economical for home use, single-serve sticks travel well, and effervescent tablets are the most portable of all — they just need a glass of water and ten seconds to fizz. Think about where you’ll actually drink these and pick the format that fits.
Quick Comparison
| Model | Best For | Sodium | Sweetener | Servings | Amazon |
|---|---|---|---|---|---|
| JYNOREX Powder Packets★ Best Overall | High-sodium hydration | High | Stevia | 30 | Amazon |
| Flyby Strawberry LemonadeBest Plant-Based | Everyday clean hydration | Sea Salt | Stevia & Monk Fruit | 30 | Amazon |
| Propel Variety PackBest Low-Sodium | Low-sodium everyday | Low | Sucralose | 32 | Amazon |
| Keppi Tropical Variety | Clean, low-sodium mix | Low | Stevia | 30 | Amazon |
| Nuun Zero Sugar Tablets | Portable tablet hydration | 200 mg | Stevia | 40 | Amazon |
| Ultima Crave Killer | Curbing cravings | Low | Stevia | 14 | Amazon |
| Pedialyte Zero Sugar | Rapid rehydration | Moderate | Sucralose | 24 | Amazon |
| My Adventure to Fit Variety | High-potassium flavor | 111 mg | Stevia | — | Amazon |
| LMNT Lemonade Salt | Serious fasters | Very High | Stevia | 30 | Amazon |
In-Depth Reviews
1. JYNOREX Electrolytes Powder Packets
Our pick — over 4.5★ from 700+ verified ratings; the strongest balance of quality and price.
The 30-stick variety pack that delivers a serious sodium punch without a hint of sugar.
This is the pick for fasters who feel the afternoon crash hardest. Each packet is built around high sodium, and the formula packs 9 electrolytes and 3 nutrients — sodium, calcium, potassium, magnesium, zinc, and more — so you’re replacing the full mineral spectrum your body sheds during a fast, not just one. It’s sweetened with stevia, which means zero calories and no insulin spike.
Buyers report that the sticks “dissolve fast without residue” and are “not overly sweet,” and the effect they describe is telling — less brain fog and fewer cramps during workouts and hot days. That’s the exact symptom relief you want when you’re running on an empty tank.
One packet mixes into anywhere from 16 to 32 ounces of water, depending on how salty you like it. That flexibility lets you dial in your preferred strength, a small tweak that makes daily hydration easier.
What wins people over
- High-sodium formula targets the #1 mineral lost during fasting
- 30 individual packets make portioning and travel easy
- 8 flavors in one box keep daily hydration from getting boring
Before you buy
- If you’re sodium-sensitive, the “high sodium” focus may be too much for you
- The 10.5 oz container is bulkier than slim stick boxes
Reach for this if: you want one box that covers a month of fasts with real electrolyte depth and flavors you’ll look forward to.
Think twice if: a doctor has told you to restrict sodium — this mix leads with it.
2. Flyby Electrolytes Powder — Strawberry Lemonade
A clean plant-based formula that fasters compare to a daily ritual, not a chore.
Flyby earns its label through an ingredient list that’s free of fillers and artificial anything. It pulls sodium from sea salt and adds potassium, Aquamin calcium (a mineral-rich seaweed-derived calcium), and magnesium — plus 72 trace minerals for good measure. It’s sweetened with both stevia and monk fruit, a double-plant combo that keeps it naturally sweet with zero calories.
The standout stat here is its weight — a 12.5-ounce container, which is about 2.7x heavier than Propel’s 4.66-ounce box. That bulk means more product per purchase, which buyers notice. They also report that since switching to this, dehydration is simply “no longer” a daily problem — the kind of consistent, everyday relief you want from a fasting companion.
Taste is a genuine strength, with buyers praising it as “extremely refreshing” and good enough to make you drink more water — which is half the hydration battle. The main wish from owners is more flavor variety, so if you commit to this one, be ready for strawberry lemonade as your daily driver.
Taste test: The most-praised aspect by a wide margin is flavor (buyers single it out far more than any other trait), and the clean plant-based lineup backs it up.
Fit check: This is built for fasters who want a trustworthy daily mix with no artificial anything — and don’t mind one great flavor over a variety arsenal.
Your daily driver if: you value clean, vegan, plant-based ingredients and a taste that keeps you coming back.
Not your pick if: you need a multi-flavor variety pack to stay interested month after month.
3. Propel Electrolyte Powder Drink Mix — Variety Pack
The Gatorade-backed mix that proves low sodium can still get the job done.
Propel comes from PepsiCo’s sports-science lineage, and it shows in the formula’s balance. Each of the 32 sticks delivers sodium and potassium to replace what you lose in sweat, plus vitamins B3, B5, B6, B12 and antioxidants C and E. It’s the “enhanced water” approach — a lighter electrolyte profile rather than a heavy saline hit.
Buyers specifically call out that it hydrates “without overdoing it,” and that the low sodium keeps their heart from racing the way heavier mixes sometimes do. That makes it a gentler option for fasters who are sodium-conscious or just beginning their fasting journey and don’t need the full-mineral assault yet.
The 32-serving box splits into three flavors — Raspberry Lemonade, Kiwi Strawberry, and Watermelon — so you get rotation built in. At 4.66 ounces, the whole box is about 2.4x more compact than the JYNOREX tub, sliding easily into a work bag or gym duffel.
The balance read: Flavor is what owners praise most here, and the low-sodium angle is a genuine differentiator for heat-intolerant or sodium-sensitive users.
Who it’s for: fasters who want consistent, light, everyday hydration in a compact, portable box — without a heavy salt wallop.
Pick this when: you want a light, reliable, low-sodium hydration boost that mixes clear and tastes clean.
skip it if: you’re deep into a long fast and need the heavy sodium that only a high-salt formula provides.
4. Keppi Electrolytes Powder Packets — Tropical Variety
A clean-label tropical mix that skips the salty aftertaste most electrolyte powders can’t shake.
Keppi is built for ingredient-conscious fasters — keto, vegan, and paleo-compatible with zero calories and zero artificial dyes. The formula balances potassium, magnesium, calcium, and sodium without going overboard on any one mineral, which is exactly the “light and fresh” approach the brand promises.
What buyers respond to is the low sodium. The refrain across reviews is that this is “finally” an electrolyte product without a crazy amount of sodium — and the packets also dissolve easily in water, tasting best when the water is cold. It’s the pick for people who’ve been turned off by the aggressive saltiness of specialty fasting brands.
The honest caveat is that flavor is polarizing. While some buyers call the flavors “fantastic,” others describe a “strong medicinal taste” that fruit couldn’t hide, and a few note the packets don’t tear open cleanly. This is a taste-it-for-yourself situation rather than a universal crowd-pleaser.
What owners raise most: the low-sodium, clean-ingredient angle, and the fast-dissolving sticks that work without a shaker.
Fair warning: flavor expectations vary wildly — if you’re sensitive to non-sugary tastes, order one box before committing.
Your pick if: you want a low-sodium, keto-friendly mix with genuinely clean ingredients that dissolve instantly in cold water.
Look elsewhere if: you need a guaranteed crowd-pleasing flavor you already know you love.
5. Nuun Zero Sugar Hydration Electrolyte Tablets — Mixed Citrus
The fizz-tablet that changes the portability game for fasters always on the move.
Nuun flips the format entirely — instead of powder sticks, you get effervescent tablets that dissolve in 16 ounces of water in seconds. Drop one in and you’re done. No shaking, no clumps, just a lightly carbonated citrus drink. It’s the easiest format on this list for travel, the office, or the gym locker.
Each tablet delivers a precise electrolyte dose — 200 mg sodium, 125 mg potassium, 75 mg chloride, 30 mg calcium, and 20 mg magnesium — which is a moderate, well-rounded profile suited to “light movement or rest,” not just hard training. The Mixed Citrus 4-pack gives you 40 servings across Orange Sunrise and Lemon Splash, and it’s vegan, non-GMO, and zero sugar.
Buyers in hot climates are the most enthusiastic, calling it their go-to for golf in Texas heat and daily training. The one recurring note is that it’s the “only drinkable” non-sugary electrolyte for people who gag on the heavier brands — less salty than Liquid IV, they say, which is high praise from that crowd.
Format win: the slim 3.17-ounce tube fits in a pocket or purse and stays closed — genuinely travel-proof.
The trade-off: tablets dissolve slower than powders, so it’s not ideal for chugging mid-workout.
Grab this for: hot climates, travel, and anyone who wants a light, fizz-clean drink without the salt-bomb taste.
Give it a pass if: you want the immediate saturating effect of a heavy-dosed powder stick.
6. Ultima Replenisher Crave Killer — Tropical Fusion
The two-in-one mix that tackles the fasting double-whammy: dehydration and the snack urge.
Fasters respond to the appetite-suppressing angle specifically. Owners mention drinking it before coffee and feeling “set for the day,” and others say it “definitely” helps keep hunger at bay. The Tropical Fusion flavor is the standout, with buyers calling it delicious enough to be a daily habit rather than a chore.
The honest note is that 14 stickpacks runs out faster than the 30-count boxes on this list, and a few drinkers report mild stomach effects. For women fasting through breastfeeding or anyone prone to nausea, it’s worth a cautious first trial.
What gets praised: flavor leads the list by a wide margin, followed by real craving relief — a combo you rarely get in one stick.
What’s mixed: the value math (14 servings vs. 30) and occasional stomach sensitivity divide opinion.
Choose this if: your biggest fasting struggle is the snack urge — this is the only mix here built specifically to address it.
Reconsider if: you want maximum servings per dollar and have a sensitive stomach.
7. Pedialyte Electrolyte Drink Mix — Zero Sugar Strawberry
The hospital-grade hydration name now in a zero-sugar stick you can carry anywhere.
Buyers lean on it for the hard-dehydration moments: Florida heat, physical jobs, and even pre-blood-draw prep. The reviews describe real results — one owner’s story involves using it to help a family member’s veins for a blood draw, which speaks to how rapidly it works. It dissolves quickly, tastes subtle (not sugary), and travels easily in a bag or car.
The formula uses sucralose rather than stevia, which is note if you avoid artificial sweeteners entirely. But for fasters who want the trusted Pedialyte efficacy in a portable packet, that’s often an easy trade.
The strength: taste and hydration lead owner praise, and the portability gets steady mentions from people who keep packs in the car.
The note: sucralose is the sweetener — fine for most, but not a stevia-only preference.
Reach for this: when you need fast, trusted rehydration after intense sweat — this is the brand with the clinical pedigree.
Pass if: you’re strictly avoiding artificial sweeteners and want a stevia-only formula.
8. My Adventure to Fit Electrolytes Powder Packets — Variety Pack
The candy-flavored mix that makes fasting hydration feel like a treat, not a supplement.
This is the “finally, a water you’ll actually want to drink” pick. The formula leads with over 600 mg of potassium per serving — dramatically higher than most competitors — while keeping sodium at just 111 mg. That’s a mineral profile perfectly suited to fasters who need potassium support without the heavy salt load, and it’s sweetened with stevia so it stays zero-sugar and zero-calorie.
Buyers rave about flavors like Blue Raspberry and Dragon Fruit, calling them genuinely delicious and free of any salty aftertaste. The dissolve is fast and clean — no grit, no clumps — which makes it easy to drink more water throughout the day. That “drinking more” effect is what keeps fasters consistently hydrated.
At 3.21 ounces, the box is compact and the single-serve sticks are gym-bag and carry-on friendly. The trade-off is the same as the Flyby — you’re committing to whatever’s inside the variety box, though here the candy-inspired lineup makes that commitment easier.
The consensus: taste is what people praise most, and the high-potassium, low-sodium ratio is the clean-label secret weapon.
The honest split: value opinions divide — most see it as a great deal per serving, a minority feel the price doesn’t match the box size.
Best for: fasters who struggle to drink enough water and want a genuinely delicious, high-potassium way to fix that.
Not for: anyone seeking a heavy-sodium sports-recovery mix after intense training sessions.
9. LMNT Zero Sugar Electrolytes — Lemonade Salt
The salty, science-backed powerhouse that fasting purists swear by for extended fasts.
LMNT is the specialist’s choice, built around one principle: salt has been misunderstood, and active people need more of it. The formula leads with sodium — a much higher dose than typical mixes — and is designed specifically for low-carb, keto, and fasting lifestyles. Buyers describe it in the most personal terms, with some flatly calling it the best electrolyte powder “period.”
The fasting credentials here are earned through real-world use. Buyers use it for One Meal A Day (OMAD) schedules and longer fasts, and report immediate relief on hot days and during baseball tournaments. The “science-backed electrolyte ratio” language means you’re getting a deliberate sodium-first formulation rather than a diluted all-purpose mix.
The catch is the taste wall — first-timers consistently say it’s “too salty,” and the brand itself suggests using half a pack to ease in. It’s also the premium-priced option on this list, reflecting the higher sodium load and the cult following. But for serious fasters, that salt-forward profile is precisely the point.
What loyalists cite: hydration and effectiveness top the praise list, with electrolyte quality close behind — it delivers on hot days when nothing else does.
The adjustment: the salt-forward taste is a real hurdle for newcomers — start with half a stick.
Choose this if: you’re committed to extended fasts or heavy training and want the serious sodium support that other mixes under-deliver.
pass on it if: you’re new to electrolytes or prefer a softer, less salty flavor profile.
Understanding the Specs
Sodium Content
Sodium is the most critical electrolyte during a fast, but brands differ wildly. High-sodium formulas like JYNOREX and LMNT are built for heavy sweaters and extended fasts, while low-sodium options like Propel and Keppi suit gentler daily hydration. If you feel light-headed while fasting, you likely need more sodium — not less.
Sweetener Type
“Zero sugar” is only half the story. The sweetener matters: stevia and monk fruit are natural, zero-calorie plant extracts that don’t spike insulin, while sucralose is artificial. For strict fasters, stevia and monk fruit are the safest bets for keeping the fasted state intact.
Electrolyte Count
Some formulas deliver 3 key minerals, others deliver 6 or even 9+ with added vitamins. More isn’t always better — the crucial ones are sodium, potassium, and magnesium. Trace extras like zinc and manganese are nice additions, but focus on getting the big three right.
Serving Format
Powder sticks, bulk tubs, and effervescent tablets all serve the same purpose differently. Sticks are the easiest for travel and precise dosing, tubs are the most economical for home use, and tablets like Nuun are the most compact — they just need water and a few seconds to fizz.
FAQ
Do sugar-free electrolytes break a fast?
Why do I get headaches and cramps during fasting?
Is stevia or sucralose better for fasting?
How much water should I mix with each packet?
Can I drink electrolyte powder during a 16:8 fast window?
What’s the difference between high-sodium and low-sodium electrolyte mixes?
Are electrolyte tablets or powder sticks better for travel?
Will these help with hunger during a fast?
Can I use these during extended fasts beyond 24 hours?
Final Thoughts: The Verdict
Across the board, the electrolytes for intermittent fasting winner is the JYNOREX Powder Packets because it delivers the high-sodium support fasters need, in 30 portable sticks with 8 flavors you won’t get bored of. If you want the cleanest plant-based formula with a taste that makes you drink more water, grab the Flyby Strawberry Lemonade. And for serious extended fasts where salt is your lifeline, the LMNT Lemonade Salt is the one to reach for.
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 August 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
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.