Essential AmiN.O. Energy
Optimum Nutrition

Essential AmiN.O. Energy

Amino Acid Powder for Increased Energy*
Train Longer and Harder with Intense Energy and Focus*
8.9 out of 10 (2,539 Reviews)
6 Sizes
3 Packets
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2 Flavors
Strawberry Lime
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Price: CA$8.71 (CA$1.45 / Serving)
Flavor Rating: 8.6
Limited Time Offer
For a limited time, buy 1 Nature's Best Zero Carb Isopure, 3 Lbs. & Optimum Nutrition Essential AmiN.O. Energy, 30 Servings 50% Off!

Product Overview

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


  • Choose from:
    12 Fruit Flavors
    4 Cafè Series Flavors
    4 Naturally Flavored Options
  • All with 100 MG Caffeine from Natural Sources & 5 G Micronized Free Form Amino Acids
  • Consistently One of’s Top Products
  • Made in ON Operated Facilities that are NSF Certified for Sport
Optimum Nutrition Isolate
Amino Energy at a glance. What: Caffeine and Amino Acids. When: Anytime, for any occasion. Why: High Quality Food Supplement.
Concord Grape Blue Raspberry Fruit Punch Green Apple Lemon Lime Orange Cooler Strawberry Lime Watermelon Blueberry Mojito Flavor Pineapple Peach Lemonade Peach Lemonade Iced Cafe Vanilla Iced Chai Tea Iced Mocha Cappuccino Iced Mocha Cappuccino Iced Mocha Cappuccino Iced Mocha Cappuccino Iced Mocha Cappuccino
ON Essential Amino Energy bottle image
ON Essential Amino Energy bottle image


  • Sweetened With Stevia Leaf Extract
  • Colored with Fruit and Vegetable Extract


  • Made with Real Colombian Coffee
  • Great Mixed Into Cold Milk
Optimum Nutrition essential Amino bottles

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. Decrease or increase the energy level as the occasion demands. Each serving provides 5 grams of micronized amino acids.

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
2,539 Ratings
Verified Buyer Rating
1,367 Ratings
Average Flavor Rating
25 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.
Verified Buyer
  • 10 Blueberry Mojito

I've been using ON products since 2011 and I SWEAR BY THEM! Their pre-workout is literally my life force: I drink it up to an hour before I work out, or have a few scoops in a big bottle of water and sip throughout the day to keep my energy up. After tasting almost every flavor, blueberry mojito is my absolute favorite! I also recommend this specific pre-workout for supplement newbies who are wary about how products will affect them. When I started supplementing, I was VERY sensitive to caffeine, but I have never felt jittery, shaky, tingly, or experienced a rapid resting heart rate using ON's amino energy. I started with a single scoop and have gradually increased my dose over time, but after years of using it, I still get the kick I need for an energized lift!

Verified Buyer
  • 4 Iced Cafe Vanilla
  • 10 Green Apple
  • 9 Strawberry Lime

Great price , and not too much caffeine (for people that are caffeine sensitive) Vanilla latte was kinda gross (only tasted good in protein powder) Green apple and Strawberry limemade are both very sweet but you need to use like 3 scoops in order to really tatse how its supposed to. Adjust the water based on your choosing. Will be buying again!

Verified Buyer
  • 8 Blue Raspberry
  • 9 Cotton Candy

I started using this product approximately 2 years ago in January of 2015. I thoroughly enjoy this product. Although you can only use this product 4 hours apart, it really works in my opinion. The recovery from this product is amazing and really helps you focus. I like to take my first serving as kind of a pick-me-up rather than an energy drink or coffee. I take my second serving approximately 20-30 minutes before my workout and then I'll take my last serving late afternoon/early evening. This is around the time exhaustion catches up to me and I'm mentally drained from the day's work and tasks. This Product has been a part of my "stack" since beginning this journey and plan on keeping it a part of it as long as my body doesn't start building a tolerance. ONE THING TO REMEMBER: ALWAYS CYCLE YOUR SUPPS! I know some people use 2 weeks and off 2 weeks, I cycle mine monthly though and haven't noticed any negative effects.


Works great with the muscle program from

Verified Buyer
  • 9 Blue Raspberry

This stuff is great! I work 12 hour overnight shifts in a rather sedentary job and it can be hard to stay awake sometimes. Whenever I start to get tired or it becomes hard to keep my eyes open, I take 2-3 scoops of this stuff in a full shaker cup of water. Even running on 4 hours of sleep I'm still able to stay awake until the end of my shift at 6 am!

† 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

3 Packets Strawberry Lime
Serving Size 1/2 Packet (9 g)
Servings Per Container6
Amount Per Serving % Daily Value
Calories 5       
Total Carbohydrate 1 g <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, Micronzed L-Lysine, Micronized L-Phenylalanine, Micronzed L-Threonine, Micronized L-Methionine
Energy Blend 160mg
Caffeine‡, Green Tea Extract (Camellia sinensis)(leaf), (standardized for Epigallocatechin gallate (EGCG)), Green Coffee Extract (bean)
* Percent Daily Values are based on a 2,000 calorie diet.
† Daily Value not established.
Other Ingredients:
Citric Acid, Natural And Artificial Flavors, Malic Acid, Silicon Dioxide, Calcium Silicate, Caffeine (from Tea and/or Coffee Bean), Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Sucralose, Beet Powder, Lecithin, Inulin.
Allergen Information:
Contains Soy (Lecithin)
‡ Total Caffeine from all sources is equal to 100mg per serving (2 scoops).

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.