Essential AmiN.O. Energy
Optimum Nutrition

Essential AmiN.O. Energy

Powdered Amino Acid Food Supplement
Unique Flavors!
8.9 out of 10 (2,548 Reviews)
2 Sizes
30 Servings
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14 Flavors
Blue Raspberry
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Competitor Price: £18.35
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Our Price: £15.99 (£0.53 / Serving)
Flavor Rating: 8.6

Product Overview

Optimum Nutrition. Anytime Energy and Amino Acid Support
Optimum Nutrition Essential Amino Energy


  • Choose from 8 Fruit Flavors & 3 Cafè Series Flavors
  • Consistently One of’s Top Products
  • Made in GMP Certified ON Owned & Operated Facilities
Optimum Nutrition Isolate
Concord Grape Blue Raspberry Fruit Punch Green Apple Lemon Lime Orange Cooler Strawberry Lime Watermelon Blueberry Mojito Flavor Pineapple Peach Lemonade Iced Cafe Vanilla Iced Chai Tea Iced Mocha Cappuccino


Optimum Nutrition Isolate


  • Cold Water or Almond Milk
  • Cafè Series Amino Energy
  • Ice Cubes
  • Optional: Non-fat Whipped Cream, Sugar-free syrup or Caramel


  1. Add cold water or Almond Milk and 2 or more scoops of Cafè Series Amino Energy to a bender jar.
  2. Blend for a few seconds, then shut off blender and add a handful of ice cubes.
  3. Blend for an additional 20-30 seconds and pour into a glass.
  4. Top off with non-fat whipped cream, sugar-free syrup or a drizzle of caramel if desired

True Strength is a journey. It never rests, it never quits. It's about overcoming obstacles, accomplishing goals, and recognizing achievements. And then it resets to achieve again. As your trusted sports nutrition partner in goal achievement, ON demonstrates that same passion while crafting our products. From the raw materials we source to our state-of-the-art manufacturing processes, no compromises are made. You set the bar higher after every workout, we set the bar higher to redefine the industry standards and ensure you realize optimum results.


There are times when you want a hefty dose of caffeine for pre-workout performance. But on other occasions, like first thing in the morning or a late afternoon pick-me-up, what you’d get from a cup of coffee is more appropriate. ON’s Essential Amino Energy™ offers the best of both with a formula that delivers 100mg of caffeine from natural sources per 2-scoop serving.

Optimum Nutrition Essential Amino Energy

Optimum Nutrition has been spotting the efforts of goal driven individuals since 1986. As one of the few companies to own and operate state-of-the-art manufacturing facilities that are GMP compliant, ON assures that every shake will mix up effortlessly because of its first-to-market instantization process. You also expect each shake to taste the same as the last and your next. That's the kind of consistency ON delivers.


Optimum Nutrition is legendary for both quality and innovation. In addition to producing the world's best-selling whey protein, ON's Gold Standard 100% Casein™ introduced slow-digesting nighttime protein to the weight training world and Essential Amino Energy™ created the anytime energy category in sports nutrition. When technology makes advancements possible, ON will be the company bringing it first to your shaker cup.

Ratings & Reviews

Overall Rating
2,548 Ratings
Verified Buyer Rating
1,376 Ratings
Average Flavor Rating
30 Flavors
Top Rated Flavor
Lime Mint Mojito
By clicking the button above, you agree to entering the Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
  • 1 Fruit Fusion
  • 2 Blue Raspberry

worst product. be smart people.they have lots of hidden info.they dont show exam amount lucine, because lucine is most expensive and all other Amino they labeled are some of cheapest one out there to increase there profit

Verified Buyer
  • 10 Concord Grape
  • 9 Green Apple
  • 4 Peach Lemonade - Exclusive!
  • 9 Cotton Candy
  • 10 Watermelon
  • 6 Blueberry Mojito

I love this product! I'm kind of weird with caffein; coffee makes me feel tired sometimes, but this is a very clean feeling energy. I vary the way I use it: I may use two scoops as a pre-workout if I need a boost, I'll drink a scoop of it if I'm fading and need a mental boost for homework, and I usually mix up a couple of scoops to sip on throughout the day when I work. I definitely feel like it helps with recovery, especially if used throughout a workout. I typically have 3-4 flavors in my cabinet so it doesn't get boring. The watermelon used to be my fav until I tried the concord grape. Watermelon is a little weaker of a flavor, but still amazing. Concord grape and green apple are intense flavors, but I usually use quite a bit of water to tone it down. All three taste just like the equivalent Jolly Rancher flavors. Cotton candy took a second to get used to, but is now my daily sipping flavor. I think it tastes more like Lucky Charms marshmallows than cotton candy though, but that's not a bad thing. Blueberry mojito was ok, but got old and tiresome really fast. Peach lemonade was awful.

Verified Buyer
  • 10 Concord Grape
  • 7 Watermelon
  • 7 Orange Cooler
  • 3 Naturally Flavored Simply Raspberry Lemonade

Love the product - especially concord grape. The simply rasberry lemonade is terrible...I have to choke it down.

  • 2 Blue Raspberry

I can't recommend this product at all. I bought it when it showed up at Costco and tried the Blue Raspberry flavor. It's gross. I choke it down as a supplement to my workout but honestly don't really feel much benefit from it. On the plus side it doesn't make me jittery but on the negative I don't get the added focus or energy that I have had from the same product by other brands. Also notable is the texture. It's a very fine powder, like casein consistency. While it blends quickly and easily, scooping it out is a mess.

Verified Buyer
  • 8 Strawberry Lime
  • 5 Blue Raspberry
  • 3 Naturally Flavored Simply Raspberry Lemonade

Not sure what happened, but the last Blue Raspberry that i got was terrible. Previously I would have rated this a 10, but based on this last batch it's moved way down. There is just no flavor. I have been using this for more than a year and always looked forward to my morning drink and now I can barely get it down. I just got the Strawberry lime to try something new and it's pretty good, but I have to add several scoops. The Simply Raspberry Lemonade had a horrible taste. Would really like to know if the formula changed or if I just got a bad batch of blue raspberry.

† This price is the retail price for this product found at one or more retail websites in the last 30 days. The price may not include shipping cost, tax, sale or promotional prices, or discounts such as member pricing. Prices may change. verifies this price every 30 days.

What's in Optimum Nutrition Essential AmiN.O. Energy

30 Servings Blue Raspberry
Supplement Facts
Serving SizeTwoScoops(9g)
Servings Per Container30
Amount Per Serving % Daily Value
Calories 10
Total Carbohydrate 2g 1%*
Amino Blend 5g
Micronized Taurine, Micronized L-Glutamine, Micronized L-Arginine, Micronized L-Leucine, CarnoSyn® Beta-Alanine, Micronized Citrulline, Micronized L-Isoleucine, Micronized L-Valine, Micronized L-Tyrosine, Micronized L-Histidine, Micronized L-Lysine, Micronized L-Phenylalanine, Micronized L-Threonine, Micronized L-Methionine
Energy Blend 160mg
Caffeine (From Green Tea)‡, Green Tea Extract (Camellia Sinensis)(Leaf)(Standardized For EGCG), Green Coffee Extract
* Percent Daily Values are based on a 2,000 calorie diet.
† Daily Value not established.
Other Ingredients:
Malic Acid, Natural & Artificial Flavors, Tartaric Acid, Silicon Dioxide, Calcium Silicate, Citric Acid, Sucralose, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Lecithin, FD&C Blue #2, FD&C Red #40, Inulin.
Allergen Information:
Contains Soy (Lecithin)
‡ Total Caffeine from all sources is equal to 100mg/9g serving.

Directions For Essential AmiN.O. Energy:

Mix two scoops of ESSENTIAL AMINO ENERGY in 10-12 oz of cold water.

FOR AN AMINO ACID BOOST: Consume one or more servings first thing in the morning and/or between meals.
FOR PRE-WORKOUT ENERGY: Take 1-3 servings 20-30 minutes before training.
FOR POST-WORKOUT RECOVERY: Take 1-2 servings immediately after training.

Do not exeed more than 5 servings per day.

TIPS: ESSENTIAL AMINO ENERGY contains 50 mg of caffeine per scoop, so do not consume after 5:00 PM if you have difficulty sleeping. ESSENTIAL AMINO ENERGY also contains beta-Alanine and may cause a temporary tingling sensation on your skin. This is normal. With continued use, the intensity of the sensation will decrease or disappear. Also, some people may have a sensitive stomach and will not tolerate green tea extract well on an empty stomach. If this is you, be sure to take with meals.


Warnings: KEEP OUT OF REACH OF CHILDREN. Check with a qualified health care professional before taking this product if you are pregnant or nursing a baby, under 18 years of age, have any known or suspected medical conditions, and/or if you are taking any prescription or OTC medications.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Learn more about Amino Acids.