Nuun
Nuun

Sport + Caffeine Tablets

4.6 out of 5· 707 reviews at The FeedHydration
$0.75per serving · $7.49 for 10
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Used for: endurance athletes

Per tablet
4g
Carbs
300mg
Sodium
40mg
Caffeine
15
Calories
✓ Informed SportVeganGluten-freeDairy-freeNothing flagged in ingredients

Summary

Nuun Sport + Caffeine Tablets is a hydration product with 300mg of sodium per serving.

Strengths

  • Batch-tested for banned substances (Informed Sport).
  • Key ingredients are well supported by research.

Weaknesses

  • No major weaknesses.

Why it scores 79

How scoring works →
Science20/25
Transparency19/25
Value16/20
Athlete experience15/20
Quality9/10

Independent analysis No brand partnerships

The details

Cross-referenced with PubMed & Examine.com

✓No flagged ingredients detected
Sodium300mg
✓ Proven

Sodium is the main electrolyte lost in sweat; replacing it supports fluid balance in long or hot sessions.

Potassium150mg
~ Likely

An electrolyte involved in muscle and nerve function; sweat losses are much smaller than sodium's.

Magnesium25mg
~ Likely

Magnesium supports muscle and nerve function and sleep; many athletes fall short of the recommended intake. Supplementing helps mainly when intake is low. Glycinate and malate forms are well absorbed and gentle on the stomach.

Calcium13mg
~ Likely

An electrolyte and bone mineral; sweat losses are small compared with sodium.

Chloride40mg
~ Likely

Chloride is lost in sweat along with sodium, and is usually replaced along with it, as sodium chloride.

Caffeine40mg
✓ Proven

Around 3mg per kg of body weight reliably improves endurance performance and focus; count all caffeine sources across the day.

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