Essential Amino Energy
Optimum Nutrition

Essential Amino Energy

Amino Acid Powder with Caffeine from Natural Sources!
Designed to Support Muscle Endurance and Recovery*
9.1  out of 10  (2,492 Reviews)
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For a limited time, buy 1 Essential AmiN.O. Energy, 65 Servings & get 1 50% OFF!
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For a limited time, buy 1 Essential AmiN.O. Energy, 6 Stick Packs & get 1 50% Off!
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For a limited time, buy 1 Essential AmiN.O. Energy, 30 Servings & get 1 50% Off!
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For a limited time, buy 1 Essential AmiN.O. Energy, 25 Servings - Natural & get 1 50% Off!

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 Amino Energy
Overall Rating
2,492 Ratings
Verified Buyer Rating
1,437 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.
Mar 20, 2020
  • 10 Green Apple
  • 9 Concord Grape

Great taste. Good energy boost.

Mar 04, 2020
  • 10 Cotton Candy

This gives me lasting energy through my workout and I use it as a pick me up during the day or I will replace it with coffee. I don't get a crash or the jitters! I will be using this for now on and excited to try other flavors.

Mar 02, 2020
  • 10 Concord Grape

Concord Grape you will never go wrong, Tastes Great and gives you immediate pump

Feb 24, 2020
Verified Buyer
  • 1 Juicy Strawberry Burst

Product works but do not believe the reviews on Juicy strawberry taste like a sour head so not good for drinking

Feb 10, 2020
Verified Buyer
  • 10 Green Apple
  • 8 Watermelon

The only preworkout I use and have used for years.. I have tried other brands and have just not been satisfied with them.

Feb 06, 2020
Verified Buyer
  • 10 Watermelon
  • 10 Blue Raspberry

I drink Amino Energy before every workout and every game. It tastes great and gives a nice energy boost without the crash. I recommend this to everyone!

Feb 01, 2020
Verified Buyer

I use several different amino energy drinks and this one is one of my favorites. Tastes great, mixes well, much better than a canned energy drink. Cheaper than canned energy drinks. Great for anytime energy and also to help with a workout or for post workout recovery. Forget monster and rockstar, AminoEnergy is where it’s at!

Jan 20, 2020
Verified Buyer
  • 10 Blueberry Mojito

Gives me the energy I need to to get me through my day and workout!

Jan 15, 2020
Verified Buyer
  • 10 Orange Cooler

Absolutely love ON Amino Energy! Gives me a nice boost throughout my day when I need it and doest have the junk that's found in canned energy drinks, not to mention its less expensive per serving.

Dec 31, 2019
Verified Buyer
  • 10 Lemon Lime
  • 5 Orange Cooler

Thus far these are the only two flavours of this product I am yet to consume as pre-workout supplements. These are great products and provide me with sufficient vitality to endure a medium to intense 1 1/2 to 2hr workout (2 scoops). The Lemon Lime flavour I favor more as it is a balance of tart to sweet, the flavour of the Orange Cooler is terrible I am still unable to describe it and would not be purchasing this particular flavour again in the future.

Dec 09, 2019
Verified Buyer
  • 10 Lime Mint Mojito
  • 10 Peach Cranberry
  • 10 Orange Cooler

The taste is perfect and the results very good. Fast shipping

Nov 07, 2019
Verified Buyer
  • 10 Juicy Strawberry Burst
  • 10 Iced Mocha Cappuccino

My go to drink whenever I need an extra push and energy. This product never failed me.

Nov 04, 2019
Verified Buyer
  • 10 Concord Grape
  • 10 Juicy Strawberry Burst

Great tasting and mixes well, 3 scoops gives you a bump of energy in the morning!

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.

5 Sizes
6 Stick Packs
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3 Flavors
Blue Raspberry
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Price: $11.99  ($2.00 / Serving)
Flavor Rating: 8.5
Designed to Support Muscle Endurance and Recovery*

What's in Optimum Nutrition Essential Amino Energy

Serving Size: 1 Packet (9 g)
Servings Per Container6
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, Beta-Alanine (as CarnoSyn®), Micronized Citrulline, Micronized L-Isoleucine, Micronized L-Valine, Micronized L-Tyrosine, Micronized L-Histidine, Micronized L-Lysine Hydrochloride, Micronized L-Phenylalanine, Micronized 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 Flavor, Malic Acid, Tartaric Acid, Silicon Dioxide, Calcium Silicate, Caffeine (from Tea and/or Coffee Bean), Sucralose, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Soy Lecithin, Blue #2, Inulin.
‡ Total Caffeine from all sources is equal to 100mg per serving (1 packet)

Directions For Essential Amino 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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