Nuun Sport Electrolyte Tablets Review

Nuun Sport is an electrolyte-rich sport hydration tablet designed to fuel an active lifestyle. According to the page, it is enhanced with electrolytes and offers a natural, low-calorie fruity flavor that mixes easily with water to make a hydrating beverage for workouts. Each Nuun Sport tube contains 10 individual tablet servings that can be taken up to 3 times per day. The formula contains five essential electrolytes: sodium, which is described as key for rehydration; potassium, which regulates healthy hydration balance; magnesium, which maintains muscle, nerve, and cell function; calcium, which helps maintain proper hydration; and chloride, which maintains proper pH levels. The product page states that Nuun Sport is designed with complete electrolytes and non-GMO ingredients for clean, guilt-free hydration. Benefits listed include no artificial flavoring or sweeteners, since the tablets are sweetened only with high-quality stevia, and the product is keto-friendly. The nutrition panel lists per serving of one 5 gram tablet: 15 calories, 0 grams fat, 300 milligrams sodium (13% DV), 4 grams total carbohydrate, 1 gram total sugars including 1 gram added sugars, 0 grams protein, 13 milligrams calcium, 150 milligrams potassium, 25 milligrams magnesium, and 40 milligrams chloride. The page describes the tablets as useful for workouts and for work days, and suggests keeping a tube in a gym bag, car, purse, hiking pack, or anywhere a replenishing drink may be needed. Badges shown include vegan, kosher, gluten-free, and non-GMO certifications. Directions say to drop one tablet into 16 fl oz of water, wait a few minutes for it to dissolve, with ice suggested to speed dissolving, then sip and enjoy. The page notes a flavor selection including Strawberry Lemonade, Citrus Fruit, Watermelon, Fruit Punch, Grape, Lemon Lime, Orange, Tri-Berry, Tropical, and Peach, though the current listing is out of stock and the page shows a price of $7.49 with a per-serving price of $0.75. A subscription option offers 15 percent savings, and an 8-tube box of 80 tablets is also offered. The page includes a 60-day satisfaction guarantee and a footnote stating the product has 1 gram of total sugars per 16 fl oz compared with 11 grams in a leading electrolyte drink mix. The page also states that these statements have not been evaluated by the Food and Drug Administration and that the product is not intended to diagnose, treat, cure, or prevent any disease.

Product Focus: EnergyAlso covers:MusclesBrainMetabolismRanked among:ElectrolytesElectrolytes as tablets and capsules
Tier ⓘ
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
Biohacker Mentions
Cost per month
$67

Study, Trial or Testing Result Summary

MembersHuman studies

2 of these 48 human studies gave the ingredient by drip or injection, not by mouth.

The main studied ingredient here at a dose is magnesium, and its evidence for energy is . In 30 adults with blood pressure, diabetes or blood fats, water giving 80 milligrams of magnesium a day for 4 weeks fatigue compared with placebo. …

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Review Totals and Summary

Members36,160 reviews
36,160 reviews · Amazon 21,485 · Nuunlife 14,139 · REI 536

Across stores, Nuun Sport Electrolyte Tablets have garnered 22021 ratings, with the themes derived from the written reviews visible on their product pages. Customers widely the tablets for their flavor and practical design. …

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Biohacker Summary

MembersWhat our biohacker panel says

of the panel or uses magnesium: five it, three use it, and two stay or cautious, with one about labels. The main reason is sleep, with taking it before bed, one suggesting 90 minutes to 2 hours ahead, and others citing blood pressure, stress, muscle recovery and general deficiency. …

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RAL Summary

MembersThe tier and why

The top grade rests on an 80 percent figure that comes from weekly magnesium injections in chronic fatigue syndrome, oral magnesium like this tablet, and the magnesium studies are split (7 , 9 ), so they do show a for energy. …

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More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Muscular system, Nervous system, Metabolic system. Combine with and possible side are for members.

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Supplement Facts

Total Carb. 4 g · Incl. 1g Added Sugars 1 g · Calcium 13 mg
Supplement Facts
Serving Size 1 tablet (5g)
Servings Per Container 10
Amount Per Serving% Daily Value
Calories15
Total Fat0 g0%
Sodium300 mg13 %
Total Carb.4 g1%
Total Sugars1 g
Incl. 1g Added Sugars1 g2%
Protein0 g
Calcium13 mg2%
Potas.150 mg4%
Magnesium25 mg6%
Chloride40 mg2%
* Percent Daily Values are based on a 2,000 calorie diet.

Other ingredients: Citric Acid, Dextrose, Sodium Bicarbonate, Potassium Bicarbonate, Sodium Carbonate, Less Than 2% Of Natural Flavor, Potassium Chloride, Magnesium Oxide, Calcium Carbonate, Stevia Leaf Extract, Avocado Oil, Beet Juice (For Color).

Directions: Drop one tablet into 16 fl oz of water. Wait a few minutes for the tablet to dissolve. Sip, savor, and enjoy Nuun Sport hydration! Can be taken up to 3 times per day.

Label source: Nuunlife · Report a label change

Where to Buy

Nuun · Amazon · Rei
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Graded October 26, 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.