Essential AmiN.O. Energy
Optimum Nutrition

Essential AmiN.O. Energy

Amino Acid Powder with Caffeine from Natural Sources!
Designed to Support Muscle Endurance and Recovery*
9.1  out of 10  (2,479 Reviews)

Product Overview

Essential AmiN.O. Energy Versions
ON Logo

Anytime Energy

And Amino Acid Support*

All Versions of Essential AmiN.O. Energy™ Offer:

  • 100mg of Caffeine
  • 5g of Amino Acids
  • 5 - 15 Calories
  • Zero Sugar

All Versions of Essential AmiN.O. Energy™ Support:

  • Essential Amino Acid Delivery
  • Energy & Focus Before, During and After Exercise or Anytime You Need a Pick Me Up*
  • Muscle Recovery After Exercise*
Essential AmiN.O. Energy Container

What Are Amino Acids?

Protein is composed of amino acids. These building blocks perform numerous functions — including their role in building muscle size and strength.

What Is Caffeine?

It is a stimulant most commonly found in tea, coffee and cacao plants. Caffeine helps provide an energy boost when needed during the day.

Essential AmiN.O. Energy + Electrolytes Products

Electrolyte Powder Mix

  • Fruit Flavored Powdered Mix
  • Replaces Electrolytes Lost in Sweat During Exercise

What are Electrolytes?

Healthy adults need minerals like potassium, sodium and magnesium. These electrolytes help support muscle function and fluid balance.* Electrolytes are lost when we sweat and can be replenished when you mix Essential AmiN.O. Energy + Electrolytes powder with at least 10 oz. of water.


  • Supports Performance by Offering Energy*, Focus*, Recovery* and Hydration†
  • Supports Endurance*
  • Supports Muscle Recovery*

† When added to at least 10oz of water

Essential AmiN.O. Energy + Electrolytes Container

Sparkling Hydration Drink

Start fast and finish strong in the gym or on the field. Essential AmiN.O. Energy + Electrolytes™ Sparkling Hydration Drink offers a combination of 5 grams of Amino Acids, 100mg of Caffeine from natural sources and electrolytes to support performance, endurance and active living.


  • Replaces Electrolytes Lost in Sweat During Exercise
  • Supports Everyday Performance and Goals
  • Supports Endurance


  • Anytime you need an energy boost
  • Pre-workout energy and hydration
  • Post-workout recovery and rehydration
AmiN.O. Energy RTD Cans

Essential AmiN.O. Energy Cafè Series

  • Made with Coffee
  • Great Mixed Into Cold Almond Milk
  • Great Coffee Taste, Without the Coffee House Price
Essential AmiN.O. Energy Cafe Containers
Essential AmiN.O. Energy Naturally Flavored Containers

Essential AmiN.O. Energy Naturally Flavored

  • Naturally Flavored
  • Sweetened with Stevia Leaf Extract
  • Colored with Fruit and Vegetable Extracts
  • No Artificial Sweeteners or Colors

Essential AmiN.O. Energy Tea Series

  • Made with Real Tea in Classic Tea Flavors
  • 100mg of Caffeine from Natural Sources
  • Supports Energy and Muscle Recovery*
Essential AmiN.O. Energy Tea Flavor Containers
Essential AmiN.O. Energy Stick Packs

Essential AmiN.O. Energy Stick Packs

  • Portable Single Serving Stick Packets. Just Add to Your Water Bottle.
  • On-The-Go Energy
  • Sold in Boxes of 6 Packs

Essential AmiN.O. Energy Ready To Drink

  • Grab and Go Anytime Energy
  • Ready to Drink!
  • No Mixing Required
Essential AmiN.O. Energy Ready to Drink Bottles

Optimum Nutrition True Strength

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. Essential Amin.o. 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 for muscle support.*


Optimum Nutrition has been spotting the efforts of goal driven individuals since 1986. As one of the few companies to operate its own 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.

History & Heritage

Optimum Nutrition is legendary for both quality and innovation. In addition to producing the world's best-selling whey protein, our Gold Standard 100% Casein™ introduced slow-digesting nighttime protein to the weight training world and ESSENTIAL AMIN.O. 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

Essential AmiN.O. Energy
Overall Rating
2,479 Ratings
Verified Buyer Rating
1,427 Ratings
Average Flavor Rating
33 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.
Oct 15, 2019
Verified Buyer
  • 6 Green Apple
  • 10 Blue Raspberry
  • 10 Orange Cooler
  • 10 Watermelon
  • 10 Juicy Strawberry Burst
  • 10 Cotton Candy
  • 10 Concord Grape
  • 10 Fruit Fusion

I really love all of these products but they recently did something to the Green Apple which previously would've gotten a 10/10 as well but I don't like it anymore. I highly recommend these as they as just great for a morning/midday pick me up for people (me) who don't like coffee because of everything you have to add to it to make it taste delicious.

Oct 08, 2019
Verified Buyer
  • 10 Concord Grape

Great product, no crash after.

Oct 01, 2019
Verified Buyer
  • 10 Juicy Strawberry Burst
Sep 18, 2019
Verified Buyer
  • 10 Concord Grape
  • 10 Orange Cooler
  • 9 White Peach Tea
  • 9 Half & Half Lemonade & Iced Tea

Delicious anytime of the day. Pre-workout, early in the morning (not a coffee drinker) or when I'm going on a long road trip to keep me alert. Wish there were more flavor options for the single serving packaging.

Sep 01, 2019
Verified Buyer
  • 10 Iced Mocha Cappuccino
  • 10 Lemon Lime
  • 10 Concord Grape

This is by far the best caffeine and amino product I have purchased. It has an amazing taste for all the flavours I have tried. The product works just as good as a coffee in the morning. Gives a great kick start to the day and a bonus of getting some amino acids in at the same time. Its great alone, on ice or blended with vanilla protein. I hope you enjoy it as much as I do.

Aug 27, 2019
Verified Buyer
  • 10 Concord Grape
  • 8 Juicy Strawberry Burst
  • 9 Watermelon

The Concord Grape is a strong subtle flavor that eases onto the pallet. The Juicy Strawberry Burst is a good after flavor but beware because it is very tart at first. The Watermelon flavor is slightly tart but has a great flavor that can be compared to watermelon bubble gum. Regardless of flavor, all the products provide a great pump without the jitters. I have started off with 2 scoops and have moved up to 4 as the bottle indicates and improved my endurance and strength. I love this product and it works great for pre and post workouts.

Aug 25, 2019
Verified Buyer

Overall energy effect is good. Been using the Fruit Fusion Flavour for the last year or so. Wanted to try a different flavour so I went with Peach Lemonade. IMO it tastes awful; something similar to axle grease. Won't be getting this one again.

Jul 28, 2019
Verified Buyer
  • 10 Juicy Strawberry Burst

I love this stuff! It’s the only Amino acid that didn’t make me nauseous. It gives me energy to keep me awake. I like the Strawberry burst, watermelon, orange, and apple. I recommend all of them.

Jul 01, 2019
Verified Buyer
  • 10 Juicy Strawberry Burst
  • 10 Green Apple
Jun 01, 2019
  • 10 Cotton Candy

Clean energy, no jitters, all focus. Take it as recommended on the container and you'll be good to go for a long session at the gym. Provided your not already drinking caffeine all through out your day, this energy works great.

May 26, 2019
Verified Buyer
  • 10 Concord Grape
  • 8 Cotton Candy
  • 10 Juicy Strawberry Burst
Apr 25, 2019
Verified Buyer
  • 10 Juicy Strawberry Burst

This Product was one of the best Amino acids I have used, whenever I am slump or too sluggish to workout this kicks me right in my game, it gives me the energy I need to complete my workout with a sick pump I have already recommended this item to a couple of my buddies so I would highly recommend this product

Apr 23, 2019
Verified Buyer
  • 4 Watermelon

I use this to wake up at work because my stomach does not like coffee. It works well without giving me those pins and needles most pre-workouts give me, maybe its because I don't use a large dose though. I bought watermelon and fruit punch after trying one that I enjoyed from Costco (I cant find it on the website so I think it was discontinued?). I haven't tried the fruit punch yet but the watermelon is NOT good.

Apr 19, 2019
Verified Buyer
  • 10 Orange Cooler
  • 10 Concord Grape
  • 9 Blueberry Mojito
  • 9 Iced Mocha Cappuccino

This product is awesome. Great to drink any time! My complain is really with the manufacturer. The 65-serving containers don’t have a seal under the lid. EVERY time I order one, it gets shaken around during shipping and a lot of it comes out. Everything in the box gets covered with it and you lose a lot of product. I only order the 30-serving size now.

Apr 07, 2019
Verified Buyer
  • 10 Half & Half Lemonade & Iced Tea

Tastes just like an Arnold Palmer. Very nice.

4 Sizes
65 Servings
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6 Flavors
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Price: $44.99  ($0.69 / Serving)
Flavor Rating: 9.0

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

65 Servings Watermelon
Serving Size 2 Scoops (9 g)
Servings Per Container65
Amount Per Serving % Daily Value
Calories 10       
Total Carbohydrate 2 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 (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:
Natural And Artificial Flavor, Malic Acid, Citric Acid, Silicon Dioxide, Calcium Silicate, Sucralose, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Tartaric Acid, Lecithin, Beet Color, 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.

STICK PACKETS: BOTTLE OF WATER: Take a sip from a full 16.9 oz. bottle of water to make room for the powder. Add one packet of AMIN.O. ENERGY™ and shake bottle to mix well until powder dissolves.


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. STICK PACKS: WARNING: Consult your physician before using this product if you are taking any medications or are under a physician's care for a medical condition. Not for use by those under the age of 18, women that are pregnant, or nursing, or those that are sensitive to caffeine or beta-alanine. Do not consume caffeine from other sources while taking this product as too much caffeine may cause nervousness, irritability, sleeplessness, and occasionally rapid heartbeat. Beta-Alanine may cause a harmless, temporary tingling or flushing sensation. Do not combine with alcohol. Do not exceed 3 packets within any 4 hour period or 5 packets within any 24 hour period. Consume as part of a healthy diet and exercise program, and drink at least 100 fl oz of water per day. Exercise may increase your need for fluid intake. Phenylketonurics: Contains Phenylalanine.

* 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.
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