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Head to head · Hydration & Electrolytes

Nuun Sport Electrolyte Tablets vs Ultima Replenisher Daily Electrolyte Drink Mix

Nuun scores higher overall (7.9 vs 7.2 out of 10), mainly on efficacy, quality & purity and transparency. Ultima still leads on experience.

Updated September 2026 from our full reviews · How we score

Higher score
Nuun Sport Lemon Lime tube with electrolyte tablets
NuunSport Electrolyte Tablets
7.9
Good

Informed Choice-certified fizzy tablets with 300 mg sodium and 1 g sugar per 16 oz: clean, affordable everyday and workout hydration, but light for salty sweaters.

Check price on AmazonBuy from the brand$7.49

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Ultima Replenisher Lemonade 90-serving canister, 30-serving canister, pouch and stickpack
UltimaReplenisher Daily Electrolyte Drink Mix
7.2
Mixed

Zero-sugar, stevia-sweetened mix with potassium and magnesium but only 55 mg sodium. Great for flavoring daily water, far too light for heavy sweating or illness.

Check price on AmazonBuy from the brand$47.99

We may earn a commission when you buy through these links — it never affects our scores. How we make money

Read the full review

We may earn a commission when you buy through these links — it never affects our scores. How we make money

The short answer

Choose Nuun if…

  • Everyday hydration with minimal sugar
  • Gym sessions, runs and rides of moderate length
  • Tested-athlete use (Informed Choice)
  • You care most about efficacy, quality & purity, transparency

Choose Ultima if…

  • Everyday hydration without sugar
  • People keeping sodium low
  • Keto, paleo and vegan eaters
  • You care most about experience
  • You want the lower cost per serving ($0.53)

Side by side

Sport Electrolyte TabletsReplenisher Daily Electrolyte Drink Mix
Our score7.9 / 107.2 / 10
Efficacy (30%)7.05.8
Quality & Purity (25%)8.87.0
Value (20%)8.28.0
Experience (15%)7.58.3
Transparency (10%)8.88.5
FormTabletPowder
Serving1 tablet (5 g) in 16 oz water10 servings per container1 scoop or 1 stickpack in 16 oz water90 servings per container
Price per serving$0.75$0.53
Testing & certifications
Informed ChoiceCertified Gluten-FreeKosherCertified VeganNon-GMO Project Verified
Non-GMO Project Verified
DietaryVegan, Gluten-free, Non-GMO, Keto-friendlyVegan, Gluten-free, Sugar-free, Keto-friendly, Paleo, Non-GMO
Key ingredients
  • Sodium300 mg
  • Potassium150 mg
  • Magnesium25 mg
  • Sugar (dextrose)1 g
  • Sodium55 mg
  • Potassium250 mg
  • Magnesium100 mg
  • Organic stevia (rebaudioside A)
Flavors8 (Lemon Lime, Strawberry Lemonade, Citrus Fruit…)8 (Lemonade, Raspberry, Watermelon…)
Creator video reviews54

Pros and cons

Sport Electrolyte Tablets

  • Informed Choice certified, plus gluten-free, kosher, vegan and Non-GMO Project certifications
  • Only 1 g sugar and 15 calories per tablet
  • Portable tablet that fits in a pocket or water-bottle routine
  • About $0.53-$0.75 per serving
  • 300 mg sodium is modest for long or hot sessions
  • Taste is polarizing and some flavors are faint
  • Tablets can be slow to dissolve and hard to shake out of the tube
  • Not suitable as a replacement for a medical ORS

Replenisher Daily Electrolyte Drink Mix

  • Zero sugar, zero calories and no artificial sweeteners
  • Meaningful potassium (250 mg) and magnesium (100 mg) per serving
  • Non-GMO Project Verified, gluten-free and vegan
  • About $0.53 per serving in the 90-serving canister
  • Only 55 mg sodium, too little to replace sweat losses during long or hot exercise
  • Not suitable as an oral rehydration solution
  • Some buyers report the powder dissolves unevenly
  • No third-party contaminant or sport certification advertised

Our verdicts

Sport Electrolyte Tablets

Nuun Sport is a well-certified, low-sugar and reasonably priced way to add electrolytes to everyday drinking and moderate workouts, which makes it our pick for general and athletic use under an hour or two. Heavy sweaters and anyone battling illness-related dehydration should look to a higher-sodium mix or a medical ORS instead.

Full review

Replenisher Daily Electrolyte Drink Mix

Ultima is an excellent choice if you want a clean, sugar-free, low-sodium way to make plain water more appealing and add some potassium and magnesium. It is not a replacement for a sodium-rich sports or rehydration drink, so heavy sweaters, endurance athletes and anyone recovering from illness should look elsewhere.

Full review

What creators say

Questions people ask

Is Nuun better than Ultima?
In our scoring, Nuun Sport Electrolyte Tablets rates higher overall (7.9 vs 7.2 out of 10). Nuun leads on efficacy, quality & purity and transparency; Ultima leads on experience. Scores weigh efficacy, quality, value, experience and transparency.
Which is cheaper per serving, Nuun or Ultima?
Ultima costs about $0.53 per serving versus $0.75 for Nuun, based on the list prices shown in our reviews. Prices change often, so check the current price before buying.
Are Nuun and Ultima third-party tested?
Nuun carries Informed Choice; Ultima has no independent certification we could verify.
Who should choose Nuun over Ultima?
Our reviews suggest Nuun is best for everyday hydration with minimal sugar, gym sessions, runs and rides of moderate length and tested-athlete use (Informed Choice), while Ultima is best for everyday hydration without sugar, people keeping sodium low and keto, paleo and vegan eaters.

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