Our readers keep the lights on and my morning glass full of iced black tea. As an Amazon Associate, I earn from qualifying purchases.5 Best Electrolyte For Water Fasting | Banish the Fasting Flu

Check Price on Amazon

LMNT is the gold standard for water fasting specifically because it delivers a full 1000 mg of sodium per serving alongside 200 mg of potassium and 60 mg of magnesium. This ratio aligns directly with the electrolyte depletion patterns observed during extended fasts, making it the most targeted option for preventing headaches, brain fog, and muscle cramps. The formulation contains zero sugar, zero artificial sweeteners, and zero calories, ensuring your fast remains metabolically pure.

Customer feedback consistently highlights how LMNT resolved constant thirst and dehydration during breastfeeding, long-distance driving, and rigorous training—scenarios that mirror the electrolyte demands of fasting. The flavor profile is described as “not overly sweet” with no artificial aftertaste, which is critical when you’re drinking multiple servings per day during a multi-day fast. Each stick pack mixes cleanly into 16–32 ounces of water without clumping.

The variety pack includes multiple flavors, allowing you to rotate tastes to avoid palate fatigue during longer fasts. It is also an excellent choice for those following strict keto or low-carb diets alongside their fasting protocol. The only notable drawback is its premium positioning relative to bulk-format options, but for a clean, precisely formulated electrolyte that won’t break your fast, LMNT is the clear top pick.

Check Price on Amazon

For those who prefer a capsule format that eliminates any taste concerns, this formula packs a comprehensive electrolyte punch with 150 mg of magnesium, 99 mg of potassium, and 315 mg of sodium per serving, plus additional minerals like zinc, chromium, and manganese. It also includes MCT powder, CoQ10, and a patented probiotic strain, which provide metabolic support and digestive regularity during fasting. The unflavored capsules are ideal for strict fasters who want to avoid any potential insulin response from sweeteners.

Users report dramatic relief from nighttime leg cramps, elimination of “keto flu” symptoms, and sustained energy throughout the day. Several reviews note that one bottle lasts approximately four months, making it an exceptionally economical option for long-term fasting protocols. The capsules are described as “large but soft and tasteless,” which is a common trade-off for the comprehensive mineral load they carry.

It’s important to note that the inclusion of MCT powder means each capsule contributes a negligible amount of fat calories — typically less than 1 gram per serving. Most strict water fasters tolerate this well, but those adhering to a zero-calorie fast may prefer a pure electrolyte capsule. The added probiotics and CoQ10, however, provide unique benefits for gut health and cellular energy production that few other fasting electrolytes offer.

Check Price on Amazon

Ultima’s Crave Killer formulation directly addresses one of the hardest parts of water fasting — managing hunger pangs. It contains Chromax, a clinically studied form of chromium picolinate shown to help curb cravings and support healthy metabolism, alongside six key electrolytes including magnesium, calcium, and potassium. The Tropical Fusion flavor is naturally sweetened with zero sugar, calories, or carbs, making it safe for a fasted state while providing a refreshing taste that helps break the monotony of plain water.

Customer reviews emphasize the product’s ability to suppress appetite, with multiple users noting they drink it before coffee or as a mid-day hydration boost to push through hunger windows. The ginger root extract in the formula also provides gentle digestive support, which can be particularly helpful as your digestive system rests during a fast. The tropical flavor is well-received, described as “delicious” and “not overly sweet” despite being naturally sweetened.

It is worth noting that the sweetener used — while zero-calorie — may still produce a mild taste that some strict fasters prefer to avoid. Additionally, the sodium content per serving is lower than what some long-term fasters need, so you may require multiple packets per day to hit optimal sodium targets. For shorter fasts or intermittent fasting windows, however, the appetite-suppressing benefit of the chromium makes this a uniquely valuable tool.

Check Price on Amazon

The SALTT Low-K Fasting Drops offer a unique solution for fasters who need to limit potassium intake due to kidney concerns, heart issues, or specific medical guidance. Each tablespoon provides 1500 mg of sodium, 113 mg of potassium, and 165 mg of magnesium, plus trace minerals sourced and filtered from the Great Salt Lake. The liquid drop format allows for precise dosing — add a few drops to your water and you have an instant, tasteless electrolyte boost without consuming a whole packet or capsule.

Users with decades-long histories of leg cramps report that these drops finally stopped the pain after a few days of use. The bioavailability of the ionic magnesium is excellent — because it’s already in liquid form, your body absorbs it more rapidly than magnesium from a pill. The dropper bottle format is also highly convenient for travel or for those who prefer to sip electrolytes gradually throughout a fasting day rather than consuming a full serving at once.

The primary challenge is the taste — described by one reviewer as “yes salty” — which is the natural consequence of a concentrated sodium solution. Some users find they need to dilute it heavily or mix it into a larger volume of water to mask the saltiness. Additionally, the small 120 ml bottle may require frequent reordering if you’re doing extended fasts. For those who need to strictly limit potassium, however, this is the only product on this list designed specifically for that purpose.

Check Price on Amazon

Cure Hydration takes a different approach by basing its formulation on the World Health Organization’s Oral Rehydration Solution (ORS) standard. This means it uses a precise ratio of electrolytes and glucose to facilitate rapid water absorption directly into the bloodstream — as effective as an IV drip, according to the WHO. It is made with plant-based ingredients including coconut water and real fruit juices, with no added sugar, artificial sweeteners, or sugar alcohols.

Customer reviews praise the product for its “decent taste” and “clean” ingredient profile, with several noting that it does not cause digestive upset like many other electrolyte powders. The Tropical Variety Pack includes multiple fruit-based flavors that many users find more palatable than traditional salty electrolyte mixes. The product is also Non-GMO Project Verified, vegan, gluten-free, and Kosher certified, making it widely compatible with various dietary restrictions.

The critical consideration for water fasting is that the ORS formula does contain glucose, which breaks the fasted state on a caloric level. While the glucose is minimal (2–4 grams per serving) and included specifically to enhance sodium absorption, strict fasters avoiding any caloric intake should be aware of this. For those on a less stringent fast or using a “dirty fast” approach, Cure provides excellent rapid rehydration with a clean ingredient profile that many find superior to artificially sweetened alternatives.