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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.

Overall Rating (4.8)
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Review by Mat on Apr 7, 2024
This stuff is awesome I have it after working 8 has on cars about 15min before gym session and I go from tired to energised ,way better than redbull and energy crap drink.

Great choice

Review by Amin on Apr 3, 2024
Verified purchase
it is a great item for everyday use to keep the energy up and fight the fatigue


Review by Egle on Mar 14, 2024
Verified purchase
Top production

Have always returned to them.

Review by Aurel P. on Mar 2, 2024
Verified purchase
Great product and service.

Very good

Review by Liam on Feb 6, 2024
Verified purchase
I don't eat early morning before training and I find the AA in this product do a good job in preventing further protein breakdown after a night of 'fasting'. The caffeine content is just right to give the boost of energy I need to get through my leg day which is when I use it.

Amino energy

Review by Jax on Dec 19, 2023
Verified purchase
Excellent product better than all preworkouts I have taken

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 Amino Ever - Great taste!

Review by Nick on Oct 30, 2023
Verified purchase
Amazing flavours, will definitely buy again!

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