Optimum Nutrition Essential Amin.o Energy

Optimum Nutrition Essential Amin.o Energy

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  • Designed for energy and muscle recovery 
  • 100 mg of caffeine 
  • 5 g of amino acids 
  • 11 flavor options
Manufacturer: Categories: ,

Pros & Cons

What we like ...
  • Affordable
  • Wide variety of flavors (11)
  • Caffeine from natural sources
What needs improvement ...
  • Some flavors sold out
  • Not all flavors offered in both sizes
  • Contains sucralose

Product Summary

Optimum Nutrition ESSENTIAL AMIN.O. ENERGY was designed to support muscle recovery and provide an energy boost at any time of day. Optimum Nutrition recommends taking this supplement by mixing 2 scoops into 10-12 ounces of cold water.

This supplement contains 100 milligrams of caffeine per serving sourced from coffee beans and tea leaves. Each serving also contains 5 grams of amino acids. Optimum Nutrition claims that the ingredients in this supplement improve energy, focus, and muscle recovery. Each serving contains 5-10 calories per serving depending on the flavor and 0 grams of sugar. However, there are artificial sweeteners like sucralose, which some people try to minimize in their diet.

This supplement has extremely positive reviews. Multiple customers shared that they have been using ESSENTIAL AMIN.O. ENERGY for multiple years. They like that it provides energy without making them jittery or resulting in a crash later. Most customers were also able to find a flavor they liked, although some people found them too sweet.


Servings per container

30 or 65

Caffeine per serving

100 mg

Calories per serving

5-10 depending on serving

Price per serving

$0.93 (30 serving), $0.77 (65 servings)


Blue raspberry, blueberry lemonade, blueberry mojito, concord grape, fruit fusion, green apple, juicy strawberry, orange, strawberry lime, watermelon, wild berry

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Optimum Nutrition Essential Amin.o Energy

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      ESSENTIAL AMIN.O. ENERGY provides energy and muscle recovery with many loyal customers.