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FREE Shaker with 100% Gold Standard Whey purchase

When you buy a 908g or 2.27kg tub


  • 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 Flavor

Review by Aimee on May 19, 2022
No chunks, not gritty, great caffeine boost! Love the cotton candy - get my sweet tooth fix!

Amino Energy

Review by Jon Maska on May 9, 2022
Great Stuff! Fast Shipping!


Review by Sarah on May 3, 2022
So far I have only tried the grape but it is amazing tasting! I really look forward to tasting some other flavours. I got it as a sample at a supplement store and immediately bought 8 boxes of the individual packs.

Blue and Purple ftw

Review by JFetter on Apr 24, 2022
I love Amino Energy and have been using it for years. It's a staple in my day and goes on vacation with me too!

Great product

Review by Kelly schultz on Apr 23, 2022
Gives me the energy I need

Excellent Energy Mix

Review by Krystle Garza on Apr 19, 2022
This product keeps me energized without the jitters & racing heart. The best taste as well, LOVE Juicy Strawberry. Product in stock & very well priced!

Kick Start!

Review by Eric Rose on Apr 19, 2022
Use this every morning to kick-start my workouts! Also, on this off days when I need a little boost. Prefer Blue Raspberry - when will the 65 serving bottle be available?

My Go To For Endurance Routines!!!

Review by Jocalyn Bryant on Apr 13, 2022
Great for bodyweight endurance workouts, mid and long distance running!!! Also, all of the flavors I have purchased taste amazing!!! Furthermore; the weight management (advanced amino energy), electrolyte and collagen versions of the amino energy are very effective!!!

My Go To For Endurance Routines!!!

Review by Jocalyn Bryant on Apr 9, 2022
Perfect for bodyweight endurance routines (including mid or long distance running)!!! Also, every flavor I have purchased is delicious!!! Furthermore; the electrolyte, weight management and collagen versions of the amino energy are very effective as well!!!

My Go To For Endurance Routines!!!

Review by Jocalyn Bryant on Apr 8, 2022
Every single flavor is delicious!!! Furthermore; the collagen, electrolyte, and weight management versions of the amino energy are very effective!!!

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