Top10Supps Guarantee: The brands you find listed on hold no influence over us. They cannot buy their position, receive special treatment, or manipulate and inflate their ranking on our site. However, as part of our free service to you, we attempt to partner with companies we review and may get compensated when you reach them through an affiliate link on our site. When you go to Amazon through our site, for example, we may get a commission on supplements you buy there. This does not impact our objectiveness and impartiality.


Regardless of any current, past, or future financial arrangements, each company’s ranking on our editor's list is based on and calculated using an objective set of ranking criteria, as well as user reviews. For more information, see how we rank supplements.


Additionally, all user reviews posted on Top10Supps undergo screening and approval; but we do not censor reviews submitted by our users — unless they're being investigated for authenticity, or if they're in violation of our guidelines. We reserve the right to approve or deny any review posted to this site in accordance with our guidelines. If you suspect a user submitted review to be intentionally false or fraudulent, we encourage you to please notify us here.

ⓘ Top10Supps may receive a portion of revenues if you buy something using a link on this page. Read our disclosure page for more details.

Optimum Nutrition Essential AmiN.O. Energy Overview


Where to Buy ON Essential AmiN.O.

What Does Optimum Nutrition Essential AmiN.O. Energy Claim to Do?

Optimum Nutrition Essential AmiN.O. Energy contains a simple blend of free form amino acids and caffeine-based stimulants to help kick start your workouts while also providing your muscles with things they need to fight excessive catabolism.

The inclusion of Beta-Alanine is noteworthy because it helps to act as a buffer against lactic acid so that you can work longer and harder throughout your workouts and even during individual higher-rep sets.

It should be noted that this product contains caffeine, so if you are particularly sensitive to stimulants then you will definitely want to bear this in mind before placing your order.

What’s in Optimum Nutrition Essential AmiN.O. Energy?

Optimum-Nutrition-Essential-AmiNo-Energy-Nutrition-Label facts

This supplement contains a great blend of compounds to give your workouts just the boost you’ve been looking for, so let’s take a look at the ingredients list:

  • Amino Blend, containing:
    • Micronized Taurine;
    • Micronized L-Glutamine;
    • Micronized L-Arginine;
    • Micronized L-Leucine;
    • CarnoSyn Beta-Alanine;
    • Micronized Critrulline;
    • Micronized L-Isoleucine;
    • Micronized L-Valine;
    • Micronized L-Tyrosine;
    • Micronized L-Histidine;
    • Micronized L-Lysine;
    • Micronized L-Phenylalanine;
    • Micronized L-Threonine; and
    • Micronized L-Methionine
  • Energy Blend, containing:
    • Caffeine (extracted from Green Tea);
    • Green Tea Extract; and
    • Green Coffee Extract

Taking Essential AmiN.O Energy

As per the manufacturer’s recommendations, you are to mix two scoops of Essential AmiN.O. Energy with 10 – 12 oz of cold water.

This supplement can be taken any time of day but is ideally placed first thing in the morning when you wake up feeling beaten up from yesterday’s workout, or as a pre-workout supplement taken 20 – 30 minutes prior to training.

You can also use this supplement during the post-workout period in order to help maximize your recovery.

Begin by using a single serving and then increase from there once you have assessed your tolerance to the ingredients.

What are the Benefits?

The most obvious benefit of Essential AmiN.O. Energy is that it contains the BCAAs L-Valine, L-Isoleucine, and L-Leucine, the latter of which is instrumental in stimulating protein synthesis within the body so that your muscles have what they need to repair themselves more efficiently.

Citrulline is also an interesting addition in that it, in combination with L-Arginine, promotes nitric oxide production throughout the body resulting in increased pumps and vascularity.

Furthermore, the inclusion of caffeine means that you will benefit from enhanced energy output.

Note: Speak with your doctor before taking this product and always follow the manufacturer’s instructions on the label.

Are There Any Precautions?

This product is not to be used by people under the age of 18 years, nor is it considered suitable for women who are pregnant or breastfeeding.

If you are taking any prescription or over-the-counter medications, or you suffer from pre-existing medical conditions then you are advised to consult with your doctor or physician prior to using Essential AmiN.O. Energy.

Available Flavors and Serving Sizes

Optimum Nutrition Essential AmiN.O. Energy is available in the following flavors:

  • Blue Raspberry
  • Concord Grape
  • Cranberry Orange
  • Fruit Fusion
  • Green Apple
  • Lemon Lime
  • Orange Cooler
  • Strawberry Lime
  • Watermelon

What’s more, it is also available in the following serving sizes:

  • 10 Servings
  • 30 Servings
  • 60 Servings

The 10-serving container is the perfect way for all you first-time users to try out the product to assess your tolerance to the ingredients while also ensuring you can find a flavor you like before opting for a bigger packet.


Optimum Nutrition or ON is certainly one of the best supplement brands on the market these days, and they’ve done a fairly decent job with Essential AmiN.O. Energy.

Is it Worth the Money?

If you are happy with the caffeine content then this supplement is definitely worth the money.

Wrapping Up

You really can’t fault Optimum Nutrition for the formulation of this product because combining BCAA with L-Arginine, Citrulline, and L-Glutamine gives you a well-rounded selection of amino acids that may definitely give you a noticeable boost of temporary energy, strength, and all-round endurance while training.

Leave a Review

Have you tried this product? Let us know how it is by leaving your own personal review below!

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

About the Author