Our Verdict
Nuun Rest is a unique product in the electrolyte space, combining 300mg magnesium with sleep-support ingredients (tart cherry, chamomile, elderberry) in an effervescent tablet. The magnesium dose is clinically meaningful and the blend of citrate + carbonate + oxide forms is better than Sport's oxide-only approach, though the oxide component still limits total absorption. Good value at $0.75/serving with Informed Choice certification.
Evident Ratings
Nuun Nuun Rest Electrolyte Tablets
Scored across 5 dimensions on a 5-point scale
About Nuun
Part of Nuun's lifestyle line (alongside Sport, Energy, Immunity). Positioned for nighttime recovery and relaxation. Uses the same effervescent tablet format but dissolves in 4-6 oz instead of a full glass.
Product specifications
- Form
- tablet
- Serving Size
- 1 tablet
- Calories
- 10
- Sugar
- 1g
- Made In
- USA
How we scored this
Every data point below is tagged as Verified (independently confirmed) or Claimed (brand-stated).
Material Safety
- No Artificial Sweeteners
- YesVerified
- No Artificial Flavors
- YesVerified
- No Artificial Colors
- Yes — Uses riboflavin, beet powder, elderberry for colorVerified
- No Natural Flavors
- No — Contains 'Natural Flavors'Verified
- No Fillers
- No — Contains avocado oil, dextroseVerified
- Transparent Label
- YesVerified
- No Proprietary Blends
- YesVerified
- Clean Mineral Sources
- No — Contains Magnesium Oxide alongside citrate and carbonate formsVerified
- Sweetener
- Stevia Leaf ExtractVerified
- Full Ingredients
- Citric Acid, Dextrose, Magnesium Carbonate, Magnesium Oxide, Magnesium Citrate, Sodium Bicarbonate, Potassium Bicarbonate, Potassium Carbonate, Whole Tart Cherry Powder Extract, Natural Flavors, Avocado Oil, Chamomile Extract, Riboflavin (color), Stevia Leaf Extract, Malic Acid, Beet Powder (color), Elderberry ExtractVerified
Testing & Trust
- Third-Party Tested
- Yes — Nuun Rest is Informed Choice certifiedVerified
- COA Available
- Unknown
- Heavy Metals Tested
- Unknown
- Certifications
- non gmo, vegan, gluten free, keto friendlyVerified
Value & Policy
- Price Per Serving
- $0.75Verified
- Package Price
- $7.49 (10 servings)Verified
- Return Policy
- 30-day satisfaction guaranteeClaimed
- Subscription Discount
- 20%Claimed
Product Features
- Sodium
- 100mgVerified
- Potassium
- 100mgVerified
- Magnesium
- 300mgVerified
- Sodium Source
- Sodium BicarbonateVerified
- Magnesium Source
- Magnesium Carbonate, Magnesium Oxide, Magnesium Citrate (mixed forms -- citrate is good, oxide is poor)Verified
- Amazon Rating
- 4.5 stars (5,000 reviews)Verified
- Red Flags
- Still uses Magnesium Oxide as one of the magnesium sources (though blended with better-absorbed citrate); Sleep claims are not FDA-evaluatedVerified
See how Nuun stacks up against every electrolytes we tested
Our full electrolytes comparison ranks every brand across the same scoring dimensions you saw above — formulation, testing, trust, value, and sourcing.
See Best Electrolytes →Other top electrolytes we tested
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