Optimum Nutrition Amino Energy
by Optimum Nutrition
"Amino acids + natural caffeine — the versatile energy and recovery drink for any time of day"
Overview
Optimum Nutrition Amino Energy combines free-form amino acids (including BCAAs and essential amino acids) with natural caffeine from green tea and green coffee extract (100mg per 2-scoop serving). The versatile formula can be used as a pre-workout (4 scoops for 200mg caffeine), a midday energy boost (2 scoops for 100mg caffeine), or a post-workout recovery drink. With 30,000+ Amazon reviews, it's one of the most popular amino acid supplements ever created. The flavor range is extensive, with Concord Grape and Watermelon being fan favorites.
Key Ingredients
| Ingredient | Amount |
|---|---|
| Amino Acid Blend | 5 g |
| Natural Caffeine (Green Tea/Coffee) | 100 mg per 2 scoops |
| BCAAs | Included |
| Essential Amino Acids | Included |
Pros & Cons
What We Like
- Versatile dosing (1-4 scoops)
- Natural caffeine source
- 30,000+ Amazon reviews
- Excellent flavors
- Low calorie (10 cal per serving)
What Could Be Better
- Proprietary amino blend
- Low total amino acids per serving
- Not a replacement for protein
- Contains artificial flavors
Who Is This For?
Best For
- Versatile energy and amino drink
- Pre-workout with adjustable caffeine
- Midday energy boost
- Those wanting flavored amino acids
Not Ideal For
- Those wanting clinical amino doses
- Those avoiding artificial flavors
- Those wanting full EAA profile
Our Verdict
ON Amino Energy is the Swiss Army knife of amino supplements — versatile dosing, great flavors, and natural caffeine make it useful for any time of day. The amino doses are modest, but the convenience and taste have made it a category-defining product.