ZYM Electrolyte Drink Tablets Review

ZYM Electrolyte Drink Tablets are effervescent hydration supplements. They come as small tablets that you drop into water. The tablets fizz and dissolve, much like an Alka-Seltzer, and make a lightly flavored electrolyte drink. Retailer pages describe ZYM Sport as a sugar-free electrolyte vitamin supplement. It has natural flavors and added vitamins, and the brand says it dissolves faster than competing tablets. Tablets usually come in tubes of 10. Larger tubes and single-serve sachets also exist. The usual serving is one tablet per 16 oz of water, and some users take two per larger bottle. The line includes Endurance (lemon-lime), Rival (stevia-sweetened), Catapult (caffeinated) and newer flavors such as Citrus, plus a separate Elderberry immune tablet. Formulas differ by variant. Reviewers list calories as low as 4 to 7 per tablet. The core formula is a blend of the four main electrolytes lost in sweat: sodium, potassium, calcium and magnesium. Reviewers note these are the minerals that leave the body in sweat. Replacing them is a logical way to support hydration. The labeling claims the formula combats fatigue, muscle cramps and lactic acid build-up. The brand frames this as fresh legs, natural energy and higher endurance. One reviewer was skeptical of those claims. He said they are hard to verify outside a lab, though he found the tablets convenient. The mechanisms work as follows: - Sodium and potassium maintain fluid balance across cell membranes. Sodium also drives water absorption in the gut and supports nerve signaling. - Calcium and magnesium support muscle contraction and relaxation, and so help with cramp-prone muscles. - Carbonate or bicarbonate in the effervescent base makes the fizz, speeds dissolution and is described as soothing to the stomach. Citric acid provides the tart flavor, and in some versions a small amount of sucrose or stevia sweetens it. - B-vitamins vary by formula. B6 is cited for oxygen use in muscles in the Endurance version. B12 is paired with caffeine in Catapult to counter jitters. - Vitamin C is included in some versions. - Catapult adds guarana, a natural stimulant, for roughly 100 mg of caffeine per tablet. The tablets contain almost no carbohydrate. One reviewer therefore called them a way to stay hydrated, not fueled, and said you still need food or gels on long efforts. They are gluten-free and vegan-friendly. One reviewer reported Informed Sport approval. The format is compact and portable, and each tablet gives a measured dose. That makes it practical for bike bottles, hydration reservoirs, running belts and travel bags.

Product Focus: Hydration MenAlso covers:KidneysMusclesHeartRanked among:ElectrolytesElectrolytes as tablets and capsules
Tier ⓘ
Tier 3
Tier 3 · Reviewed. Strong review agreement, with limited or early support from human studies. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
73 /100
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
93% of 10,000
Biohacker Mentions
9 of 10

Study, Trial or Testing Result Summary

Members Only40 human studies · 13 improved

1 of these 40 human studies gave electrolytes by drip, not by mouth.

40 human studies13 improved20 no effect6,203 people studied

The electrolytes in this tablet are listed only as a blend, so the amount per serving is not known and cannot be compared with the doses studied. The research on electrolyte drinks for fluid retention is mixed. In a trial of 72 healthy fasted men, one litre of an oral rehydration solution led to less urine over four hours than plain water, meaning more fluid was kept, while a regular sports drink did no better than water [1]. In 26 athletes who lost weight through sweating, rehydration drinks kept about three quarters of the replaced fluid, compared with a little over half for water [2]. In 18 active adults at rest, water with electrolyte tablets similar in format to this product gave better fluid balance than plain water [3]. Other trials found no benefit. In 15 dehydrated men, an electrolyte drink without sugar held fluid no better than water [4]. In 19 young adults, electrolytes alone did not reliably beat water, though electrolytes with sugar did [5]. In 16 wildfire workers on a long shift, adding an electrolyte mix to water did not change hydration [6]. Because this product is very low in sugar, the trials of sugar-free electrolyte drinks are especially relevant. Animal and cell studies are never counted.

See all 40 studies →Hide the studies

Review Totals and Summary

Members Only10,000 reviews · 93% positive
10,000 reviews · Google Shopping 10,000
93% positive0% neutral7% negative

Customers consistently praise the taste. They call it clean, light and not overly sweet, and they say it has none of the chemical or syrupy aftertaste of conventional sports drinks. Several reviewers preferred it to Nuun, and the raspberry, citrus and lemon-lime flavors get specific mentions. Many say the pleasant flavor helps them drink more water during rides and runs. Long-term users, including cyclists and distance runners with nine or ten years of use, say they have not switched back. Several moved over from Gatorade because of the low sugar and low calories. Reviewers also like the tablet format: it is portable, easy to toss in a bag or transition kit, and easy to dose. The mild carbonation also gets praise. Some users report less fatigue, achiness and cramping after long efforts. They also say it helps in hot conditions or on long indoor rides with heavy sweating. Retailer reviews on ZYM's own site are very positive and also mention good customer service that fixed order problems quickly. The complaints are more practical. The tablets are fragile. Testers said they break or slide around in the tube as it empties, which leaves powder at the bottom. Some said they dissolve more slowly than Nuun and taste subtler. Because there is almost no sugar, some athletes missed the energy of a regular sports drink on longer runs and found it less useful as a recovery drink. Several reviewers said it is not cheap. One said it works best on long or hard rides. Another said it only comes in limited flavors. Reviewers who tried it carefully were often unsure how much of the benefit was physiological and how much came from drinking more. One said he could not tell whether it changed his performance. Caffeinated versions are praised for the energy boost, but they suit users who want the caffeine. One reviewer also noted that you should let the fizz settle before drinking. Caveat: much of the independent review coverage I found is older, including road.cc, MTBR, Slowtwitch and a 2011 blog. The brand's own site shows only a small number of newer reviews. Little feedback came from marketplaces, so this is a limited sample.

Biohacker Summary

Members Only9 of 10 recommend it
9 of 10 biohackers on our panel recommend it

Most of the panel recommends or uses electrolytes, and only one of the ten leans toward caution. People take them for hydration first thing in the morning, during fasting or keto, around workouts and sauna sessions, and to ease hangovers, with several linking them to focus, energy, and fewer muscle cramps. The sodium, potassium, and magnesium combination comes up again and again, and one panelist gave doses of about 600 to 700 milligrams of sodium, 100 to 200 milligrams of potassium, and 60 to 100 milligrams of magnesium around sauna use. Several mix them into plain water, one adds Himalayan salt, and one pairs them with a ketone supplement. The one cautious voice says you do not need electrolyte supplements if your food supplies enough minerals, unless you exercise and sweat a lot, and adds that daily use can be bad for some people who eat many processed foods and are overweight.

See all 10 biohackers →Hide the biohackers
  • Dr. Eric Berg · Electrolytes · neutral
    • 28 Oct 2026 · neutral · YouTube ↗
      Explains that electrolytes are electrically charged minerals that become conductive in water and are used by the body to conduct nerve impulses, contract and relax muscles, maintain pH, and push fluid through the body.
    • 22 Oct 2026 · recommends · YouTube ↗
      States that hydration is water plus electrolytes like sodium, implying their importance for proper hydration.
    • 2 Oct 2026 · recommends · YouTube ↗
      Dr. Eric Berg 1000% recommends taking electrolytes while fasting.
    • 20 Sep 2026 · recommends · Facebook ↗
      Recommends taking electrolytes to block the effects of sugar, for keto and IF side effects, and for excess water.
    • 7 Sep 2026 · recommends · Facebook ↗
      Recommends including electrolytes when doing keto and fasting to prevent nutritional deficiencies.
    • 4 Sep 2026 · neutral · X ↗
      Dr. Eric Berg states that juice can interfere with electrolytes during a cleanse or fasting plan.
    • 30 Aug 2026 · recommends · Instagram ↗
      Recommends maintaining the right balance of water and electrolytes for proper hydration.
    • 29 Jul 2026 · recommends · Instagram ↗
      Recommends focusing on electrolytes to increase energy naturally.
    • 22 Jun 2026 · recommends · Podcast ↗
      Electrolytes become even more important at this stage, especially magnesium.
    • 20 Jun 2026 · recommends · YouTube ↗
      States that a big mistake people make during prolonged fasting is not consuming enough electrolytes, which can lead to trouble.
  • Thomas DeLauer · Electrolytes · uses
    • 28 Oct 2026 · uses · YouTube ↗
      Uses Element electrolytes first thing in the morning, finding that they significantly improve his workout performance and strength in the gym.
    • 24 Oct 2026 · uses · YouTube ↗
      Personally uses Element electrolytes in the morning, noting that they helped his workout performance and gave him more strength in the gym, almost as much as his pre-workout.
    • 15 Oct 2026 · uses · Instagram ↗
      Personally uses electrolytes, stating that they can play a role in appetite and help curb it.
    • 14 Oct 2026 · uses · YouTube ↗
      Might have some electrolytes before fasted training.
    • 11 Oct 2026 · recommends · YouTube ↗
      Recommends using electrolytes, especially when fasting, to maintain hydration and prevent muscle soreness and dysfunction.
    • 26 Sep 2026 · recommends · YouTube ↗
      States that electrolytes become imperative if using sauna during the fast, recommending products with 500 mg or more of sodium to replace what is lost.
    • 13 Sep 2026 · uses · YouTube ↗
      Uses Element electrolytes in the morning, mixed with lemon juice and apple cider vinegar, to replenish sodium, potassium, and magnesium after working out.
    • 6 Sep 2026 · recommends · YouTube ↗
      Recommends focusing on electrolytes and mineralization, especially for those on a low-carb diet, and suggests Element Electrolytes.
    • 5 Sep 2026 · recommends · YouTube ↗
      Recommends focusing on electrolytes and mineralization, especially with a low-carb diet, and mentions Element electrolytes which provide 1,000 mg of sodium, 200 mg of potassium, and 60 mg of magnesium.
    • 29 Aug 2026 · recommends · YouTube ↗
      Recommends focusing on electrolytes and mineralization, especially when following a low-carb diet, and provides a link for a free sample variety pack of Element Electrolytes.
  • Andrew Huberman · Electrolytes · recommends
    • 26 Oct 2026 · recommends · YouTube ↗
      Emphasizes the importance of adequate electrolytes, specifically sodium, magnesium, and potassium, for the functioning of all cells, especially neurons.
    • 1 Oct 2026 · uses · YouTube ↗
      Huberman mentions that he consumes water with electrolytes during his fasted workout and first bout of focused work, noting that being well hydrated and having enough electrolytes is important for mental clarity when fasted.
    • 14 Sep 2026 · recommends · YouTube ↗
      Emphasizes the importance of adequate electrolytes, specifically sodium, magnesium, and potassium, as they are vital for the functioning of all cells in the body, especially neurons.
    • 10 Aug 2026 · recommends · YouTube ↗
      States that proper hydration and adequate electrolytes, specifically sodium, magnesium, and potassium in the correct ratios, are critical for brain and body function and the functioning of all cells, especially neurons.
    • 27 Jul 2026 · recommends · YouTube ↗
      States that adequate electrolytes, specifically sodium, magnesium, and potassium, are vital for the functioning of all cells in the body, especially neurons, and are critical for brain and body function.
    • 22 Jun 2026 · recommends · YouTube ↗
      States that proper hydration is critical for brain and body function, and it's important to get adequate electrolytes, specifically sodium, magnesium, and potassium, which are vital for the functioning of all cells in the body, especially neurons.
    • 22 May 2026 · uses · X ↗
      He takes LMNT electrolytes in the morning for hydration.
    • 27 Apr 2026 · recommends · YouTube ↗
      States that adequate electrolytes, specifically sodium, magnesium, and potassium, are vital for the functioning of all cells in the body, especially neurons.
    • 20 Apr 2026 · recommends · YouTube ↗
      States that proper hydration and adequate electrolytes, specifically sodium, magnesium, and potassium, are critical for brain and body function.
    • 26 Mar 2026 · neutral · Podcast ↗
      Discusses why some people may benefit from increasing salt and other electrolytes.
  • Dave Asprey · Electrolytes · uses
    • 18 Oct 2026 · uses · Facebook ↗
      Includes electrolytes (sodium, potassium, magnesium) in Danger Creatine to help cells use creatine effectively.
    • 3 Sep 2026 · neutral · Podcast ↗
      Dave and Jenny dig into functional medicine tools for everyday life: electrolytes and salt for blood pressure and sleep optimization.
    • 3 Sep 2026 · recommends · YouTube ↗
      Uses Element unflavored electrolytes, taking four or five packets on big days with travel or back-to-back episodes, and salts his food heavily, stating that the difference in quality of life with electrolytes is significant.
    • 25 Aug 2026 · recommends · YouTube ↗
      Recommends Element electrolytes, which contain sodium, potassium, and magnesium in specific ratios, to prevent the 3 PM crash and support energy, focus, and fluid balance.
    • 7 Jul 2026 · neutral · YouTube ↗
      Mentions electrolytes as one of the ingredients in the Ageless Cocktail, which is designed for longevity.
    • 2 Jul 2026 · neutral · Podcast ↗
      They get into why ketosis works better when you cycle in and out of it, how sodium and electrolytes play a bigger role in insulin resistance than most people realize.
    • 2 Jul 2026 · recommends · YouTube ↗
      Recommends increasing electrolytes and minerals to prevent keto flu symptoms when decreasing carbs.
    • 27 Jun 2026 · recommends · YouTube ↗
      Recommends drinking basic electrolytes if one absolutely needs something to help get through the 3-hour window before bed, as they don't trigger a massive digestive response.
    • 23 Jun 2026 · recommends · YouTube ↗
      Recommends being intentional with healthy electrolytes, distinguishing them from 'colorful' kinds.
    • 3 Jun 2026 · recommends · Facebook ↗
      Recommends electrolytes, included in Danger Creatine, to support hydration, nutrient absorption, and cellular performance.
  • Dr. Mark Hyman · Electrolytes · recommends
    • 12 Oct 2026 · recommends · YouTube ↗
      Dr. Hyman encourages people to take plenty of electrolytes during the first few days of the detox to mitigate symptoms like feeling tired and out of it, as insulin drops can lead to fluid and electrolyte loss.
    • 17 Sep 2026 · recommends · Facebook ↗
      Recommends adding electrolytes, specifically Himalayan salt, to water first thing in the morning to help with energy, focus, and overall health, as most people are dehydrated after sleep.
    • 20 Aug 2026 · neutral · YouTube ↗
      Explains that electrolytes regulate critical body functions like nerve signals, muscle contractions, heart rhythm, and fluid balance, and imbalances can lead to fatigue, weakness, heart palpitations, and muscle cramps.
    • 1 Jun 2026 · uses · YouTube ↗
      Adds electrolytes to his water when he wakes up to rehydrate from the night.
    • 18 May 2026 · recommends · YouTube ↗
      Recommends electrolytes, including sodium, potassium, and magnesium, to help the body absorb water, maintain fluid balance, and support nerve and muscle function, especially when drinking a lot of water but still feeling fatigued or foggy.
    • 8 Apr 2026 · uses · YouTube ↗
      Emphasizes the need for electrolytes, not just water, to replenish the body during exercise, which has changed everything for his performance.
    • 23 Mar 2026 · recommends · YouTube ↗
      States that electrolytes help kidneys work.
    • 15 Nov 2024 · recommends · YouTube ↗
      Encourages adding electrolytes to water, suggesting a pinch of sea salt and a squeeze of lemon, or zero-sugar electrolytes like Element or LyteShow.
    • 30 Aug 2024 · recommends · YouTube ↗
      Encourages people to use electrolytes with their water at least a couple times a day to help with hydration.
    • 19 Apr 2024 · uses · YouTube ↗
      Uses Lightshow electrolytes, noting that he loves their clean products, which come in chicken soup or lemon flavors.
  • Bryan Johnson · Electrolytes · recommends
    • 24 Jul 2026 · recommends · TikTok ↗
      Recommends drinking electrolytes before and after sauna.
    • 7 Nov 2025 · recommends · YouTube ↗
      Increased the amount of electrolytes by 50% before and 50% immediately following sauna sessions to combat dehydration and night cramps caused by being a salty sweater.
    • 28 Aug 2025 · uses · YouTube ↗
      Chugs a big thing of water with electrolytes, specifically 750 milligrams of sodium with potassium and magnesium from Derek More Plates More Dates, every morning for hydration.
    • 26 Jun 2025 · uses · YouTube ↗
      Uses Blueprint electrolytes, taking half before and half after his sauna session, to prevent intense cramps he experienced when he was not replenishing enough. He estimates his intake to be around 600-700 mg of sodium, 100-200 mg of potassium, and 60-100 mg of magnesium.
  • Siim Land · Electrolytes · warns
    • 8 Apr 2026 · warns · YouTube ↗
      States that you don't need to be taking electrolyte supplements or add salt to every sip of water, as long as your food contains minerals and electrolytes, unless you exercise and sweat a lot.
    • 5 Jan 2026 · uses · YouTube ↗
      Will experiment with more hydration and electrolytes, as he will be exercising and sweating more, and he wonders if consuming more electrolytes and salt will unlock his performance.
    • 28 Dec 2025 · neutral · YouTube ↗
      States that electrolytes are good for exercise performance, but for general daily use, they are 'okay', and can be 'bad' for some people who consume a lot of processed foods and are overweight.
    • 21 Nov 2025 · uses · YouTube ↗
      Uses electrolytes and thinks it's smart to add them, especially sodium, potassium, and magnesium, when sweating a lot during sauna or exercise.
    • 18 Oct 2025 · uses · YouTube ↗
      States he does not regularly drink electrolytes but might do so occasionally.
    • 8 Oct 2025 · stopped · YouTube ↗
      Does not take electrolyte supplements despite sweating daily, as carbohydrates help him preserve electrolytes and water.
    • 20 Sep 2025 · neutral · YouTube ↗
      States that electrolytes, including sodium, potassium, bicarbonate, and magnesium, are vital for health and can also serve as a marker for kidney health.
    • 16 Aug 2025 · neutral · YouTube ↗
      States that electrolytes are good for exercise performance, but for daily use, products like LMNT are too high in sodium for average people who don't exercise or are not on a low-carb diet.
    • 16 Aug 2025 · neutral · Podcast ↗
      Discusses Electrolytes as a supplement.
    • 6 Jul 2025 · recommends · YouTube ↗
      Suggests adding electrolytes to sparkling water to help with cravings, as sometimes mineral imbalance can affect cellular function.
  • Dr. Rhonda Patrick · Electrolytes · uses
    • 24 Mar 2026 · uses · YouTube ↗
      Ingests electrolytes before eating anything, as part of his morning routine.
    • 3 Jul 2024 · recommends · YouTube ↗
      Recommends supplementing with electrolytes such as sodium, potassium, and especially magnesium to counterbalance alcohol's a med effect and excretion of electrolytes important for sleep.
    • 28 Apr 2022 · uses · YouTube ↗
      Says he takes beta-hydroxybutyrate bound to electrolytes (sodium, potassium, calcium, magnesium) daily in the morning, as electrolytes can delay gastric absorption and are often depleted during ketosis.
    • Date not recorded · uses · Website ↗
      Dr. Brooks ingests electrolytes before attending Mass.
    • Date not recorded · recommends · Website ↗
      Recommends supplementing with electrolytes (sodium, potassium, and magnesium) and staying hydrated to reduce hangover severity, as these help maintain hydration and their excretion is elevated due to alcohol consumption.
    • Date not recorded · neutral · Website ↗
      Dr. Patrick discusses the role of electrolytes during fasting.
  • Ben Greenfield · Electrolytes · uses
    • 14 Feb 2026 · uses · X ↗
      He takes LMNT electrolytes in the morning for hydration.
    • 8 Jan 2026 · recommends · YouTube ↗
      Recommends using electrolytes to ensure adequate mineral intake for proper electrochemical balance, especially if using water purification.
    • 24 Dec 2025 · recommends · Instagram ↗
      Explains that if electrolytes and trace elements aren’t replaced, mitochondrial energy production slows, hydration efficiency drops, and muscle function takes longer to bounce back.
    • 8 Oct 2025 · uses · Facebook ↗
      Uses BEAM Minerals Electrolyze to keep electrolytes topped off, which boosts hydration at the cellular level, drives nutrient uptake, and fuels natural energy production.
    • 5 Apr 2025 · recommends · YouTube ↗
      Recommends getting tested for or introducing electrolytes as a building block for testosterone.
    • 20 Mar 2025 · uses · YouTube ↗
      Adds minerals and electrolytes, like a packet of Element, to his fuel mix for long periods of activity, especially when not consuming many carbohydrates.
    • 7 Mar 2025 · uses · YouTube ↗
      Started adding more salt and electrolytes to his food and water, and realized that he started sleeping better, his cramping went away, and his performance and recovery improved. He probably gets almost six grams of salt a day from good clean sources in proper ratios.
    • 28 Dec 2024 · uses · YouTube ↗
      States he profusely salts and uses electrolytes all the time, specifically good, mineral-rich salts, to help carry a charge through the body and combat the stripping of electrolytes from food due to poor farming practices.
    • 17 Dec 2024 · recommends · YouTube ↗
      Assumes that individuals using sauna for bone density benefits were replenishing and hydrating well and adding electrolytes to prevent mineral loss.
    • 6 Dec 2024 · uses · YouTube ↗
      Implements electrolytes as a pre-workout to fuel his workout while staying in a somewhat fasted state, noting that electrolyte needs increase with low-carb or keto diets.
  • Peter Attia · Electrolytes · uses
    • Date not recorded · uses · Website ↗
      Peter states that for an hour of Zone 2 exercise, he uses water with electrolytes, but no glucose, and emphasizes that electrolytes are more necessary than glucose for hydration during activities like lifting weights.

RAL Summary

Members OnlyTier 3 for Hydration Men

Tier 3 rests on 10000 reviews with 93 percent positive, plus some trial support that electrolyte drinks, including tablets, improve fluid retention over water [3][1]. The study support is mixed, since several trials of sugar-free electrolyte drinks found no benefit [4][5].

  • Electrolytes: amount hidden in a blend

Where the evidence disagrees: 20 of the 40 human studies found no effect.

More Details

Members OnlyBody systems · Combine with · Possible side effects

Body systems: Renal system, Muscular system, Cardiovascular system

Combine with: For hydration, pair these tablets with adequate plain water intake and, for heavy sweating, additional trace minerals or a source of carbohydrate such as glucose to aid sodium and water absorption. Magnesium glycinate or citrate can help if magnesium intake is low, and vitamin B6 or taurine may support fluid balance and muscle function. If the person truly wants cellular and DNA repair support, a separate evidence-informed stack would be needed, such as NMN or NR with TMG, resveratrol or pterostilbene, CoQ10 or ubiquinol, alpha-lipoic acid, omega-3s, vitamin D3 with K2, and polyphenols like quercetin, fisetin or curcumin. Check with a clinician first, especially with kidney disease, high blood pressure, or use of potassium-affecting medications such as meds or meds.

Possible side effects: No major side effects reported. Reviewers note mild fizz that should settle before drinking, and the caffeinated version is noted for its stimulant effect.

Supplement Facts

Total Carbohydrates 1 g · Sugar 1 g · Vitamin C 100 mg
Supplement Facts
Serving Size 1 Tablet(s)
Servings Per Container 10
Amount Per Serving% Daily Value
Calories7
Total Fat0
Sodium250 mg
Total Carbohydrates1 g
Sugar1 g†
Protein0 g
Vitamin C100 mg
Pantothenic Acid5 mg
Vitamin B68 mg
Vitamin B1240 mcg
Magnesium50 mg
Calcium30 mg
Potassium50 mg
† Daily Value not established.

Other ingredients: Ingredients.

Directions: 12 oz heavy taste 16 oz medium taste 20 oz light taste ADD 1 TB TO H20 Dosage: adults, 1 tablet, dissolved in 16 oz. or water.

Barcode (UPC) 892678001089 · Label source: NIH label database · Report a label change

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Where to Buy

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Graded November 3, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.