Skip to content Skip to navigation
15% off your first order when you sign up to our newsletter
Free shipping on orders above £50
Free gift with every order over £45


Essential AMIN.O. Energy

  • 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)
Write your review here. For complaints and questions we would like to refer you to our customer service.
Please enter a headline
Please enter a comment
Please enter a rating

Bring back Lemon Lime

Review by Andrew Todd on Nov 2, 2023
i drink one flavor or another every day, but please bring back Lemon Lime!!

Best energy and tasting products

Review by Anonymous on Oct 29, 2023
Verified purchase
Amazing products! Have been drinking this stuff for years!

does what is promises

Review by Nik on Oct 21, 2023
Verified purchase
best energy supplement ive tried so far. No side effects, just pure energy, def recommend

Just enough energy

Review by Brian Wilson on Oct 2, 2023
Verified purchase
This stuff gives me just enough energy and not jittery


Review by Michael Cleavenger on Sep 12, 2023
Verified purchase
Truly helpful to my day and workouts

Best aminos I've tried

Review by Ally on Jul 31, 2023
Verified purchase
Love multiple flavors! Dissolves smoothly tastes great. What more can you want? Just wish they had a non caffeinated version in the same flavors

Everyday energy

Review by Amanda on Jul 30, 2023
Verified purchase
Taste is 10/10, I needed something for my afternoon slump, and I hate energy drinks. This was a perfect solution. Purchasing my 2nd canister today!

Juicy strawberry

Review by Albert on Jul 27, 2023
Verified purchase
One of the best tasting flavors! I’ve been drinking Amino energy for many years!

Great product

Review by Michelle on Jul 21, 2023
Verified purchase
Flavors are great and energy levels are good when using. Helps with those slumps.

Love Amino Energy!

Review by Benjamin Bohling on Jul 11, 2023
Verified purchase
I can't wait to wake up and get out of bed in the morning thanks to amino energy! Best source of caffeine I have found.

Sign up for weekly offers, news and advice

Plus 15% off your first order