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  • For anytime energy and improved focus*
  • Supports amino acid intake with 5 g of amino acids per serving
  • 100 mg of Caffeine

Product Overview


With Optimum Nutrition ESSENTIAL AMIN.O. ENERGY you can get the energy + focus to achieve your goals and take on whatever life throws at you. ESSENTIAL AMINO ENERGY is scientifically designed to support your energy needs and your long-term training.

One serving of ESSENTIAL AMIN.O ENERGY increases energy and alertness with 100 mg of caffeine from natural sources and a burst of flavour you’ll look forward to mixing into cold water anytime.Take a 30-serving tub along to the gym or your office – wherever your busy day takes you.


Ready-to-mix Amino Acid Food Supplement Powder with Caffeine and Vitamin C, with sweeteners.

*Vitamin C contributes to normal energy-yielding metabolism. Caffeine contributes
to increased alertness and improved concentration.


  • 5 g of Amino Acids per serving

  • 100 mg of Caffeine
  • Vitamin C
  • Anytime Energy
  • Improved Focus

Suggested Use

Add 2 level scoops (9 g) to 330 ml of cold water and mix.

*Food supplements are not to be used as a substitute for a varied diet. Do not exceed the recommended daily dose. Keep out of reach of children. Contains caffeine (100 mg/serving). Not recommended for children or pregnant women.

Nutritional Information

Nutritional information will be shown when a flavour and/or size is selected.

Customer Reviews

Overall Rating (4.8)
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Great taste & great product

Review by Lisa on Jan 30, 2023
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I’ve tried a few variety/flavors of amino energy but the Concord grape drink is my favorite! The taste is great & give a little pickup with out giving you a high & crash! I use as a pre/post/workout drink, or sometimes just an afternoon tasty drink! Customer service is excellent, though I’ve not had many issues the few times they have fixed what issues I have had with no issues!

Awesome company with great products and fast delivery!!

Review by Michelle on Jan 29, 2023
Verified purchase
Love how fast I get what I want!!

Great product!

Review by Anonymous on Jan 27, 2023
Verified purchase
Fruit Fusion and Orange are my go to flavors!

Love it

Review by Anonymous on Jan 21, 2023
Verified purchase
Used this product for years and love the flavors, how well it mixes and the boost it gives me.

Tastes good! Makes me focused!

Review by Anonymous on Jan 15, 2023
Verified purchase
I tried lemon, apple, and grape. Everything tastes great! And it makes me focused and energized for my workouts everyday.

Amino Energy better than the rest

Review by Anonymous on Jan 1, 2023
I was introduced to Amino energy by some fitness friends years ago and have used it ever since! Great taste with the Blueberry Lemon gives me a boost without making me shaky or feel weird. My son uses the other products and its all he likes, and has tried them all!

Optimum Nutrition

Review by Cory Faust on Jan 1, 2023
Love this product! Been using for years. Concord Grape and Blue Raspberry are my favorites.


Review by Jordan on Dec 28, 2022
Love this. My consistent workout product,

Love this energy!!

Review by Mike on Dec 24, 2022
The Amino Energy from Optimum Nutrition has been fueling me for over a decade. I don't drink coffee so this gives me that burst of energy I need in the morning and then again in the late afternoon. Some days, Amino Energy gives me the energy and focus I need to make it home in LA traffic.

Good product

Review by Sol Jacobsen on Dec 11, 2022
Good product

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