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  (2,517 Reviews)
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Order and automatically receive 25% Off in your cart on Essential AmiN.O. Energy, 25 Servings - Natural!
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Order and automatically receive 25% Off in your cart on Essential AmiN.O. Energy, 65 Servings!
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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
2,517 Ratings
Verified Buyer Rating
1,458 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 17, 2020
Verified Buyer
  • 8 Juicy Strawberry Burst
  • 9 Cotton Candy

Cotton Candy is solid. Tastes better than the Bang or Reign cotton candy drinks. Juicy Strawberry Burst is good...but **** it is SWEET. I am not sure if Cotton Candy is just more tame (I drink it with about 8oz water), but I have to put almost 2x the recommended 10-12oz of water just to be able to drink this flavor. Delicious flavor, but **** the first time I tried it with 10oz of water it was so tart! Will be trying a different flavor soon. If I find that they all are that sweet, I will modify my review to a 10 (if you can do that).

Oct 10, 2020
  • 6 Cotton Candy
  • 4 Watermelon

I actually like this product i been using it for 3 years but I can fall a sleep after using this product the caffeine in this do not wake me up it just gets my heart racing .

Oct 09, 2020
Verified Buyer
  • 10 Concord Grape

Flavor is amazing! Great pre/post workout!!!

Sep 29, 2020
Verified Buyer
  • 10 Green Apple

I tastes like green Jolly Ranchers, and I drink it during workouts. 10/10

Sep 18, 2020
Verified Buyer
  • 10 Blueberry Mojito
  • 9 Peach Lemonade
  • 10 Juicy Strawberry Burst
Sep 07, 2020
Verified Buyer
  • 10 Orange Cooler

Where is the Cafe Series flavors??? Please make these available again! These are the best, especially the vanilla. I'll need to look elsewhere if you don't bring these back. It looks like I'm not the only one with this strong opinion.

Sep 03, 2020
Verified Buyer

WHY!? Why would Optimum Nutrition remove the Café Series flavors? The Iced Mocha Cappuccino Amino Energy mixed perfectly with the Chocolate flavored Gold Standard 100% Whey protein. PLEASE BRING THE CAFÉ SERIES FLAVORS BACK.

Aug 24, 2020
Verified Buyer
  • 10 Concord Grape
  • 7 Blue Raspberry

Great product to use in the morning for energy and aminos, or as a pre-workout supplement. Very noticeable energy output when using 3 or more scoops. The recommended 2 scoops will do the job, but my preference is a little stronger. The concord grape is absolutely delicious, I love drinking it on a daily basis and don't tire of the taste. Blue Raspberry wasn't exactly great in my opinion, felt more of a blueberry juice syrup taste. Was able to drink the contents but wouldn't be my first choice when reordering.

Aug 14, 2020
Verified Buyer

where is Coffee series ???????

Aug 02, 2020
  • 3 Orange Cooler

Gives you lots of energy and tingles from the beta alanine but good lord this flavor is gross. I have to mix it with kool aid to make it tastes somewhat better.

Jul 27, 2020
Verified Buyer

PLEASE, PLEASE, PLEASE, bring back the cafe series, especially the ice vanilla. It is the absolute best.

Jul 23, 2020
Verified Buyer

Screaming PLEASE bring back the cafe series!!! Iced cafe vanilla has been my am wake up , pre and post workout for years!!! I consume EVERY SINGLE DAY!! I’m almost out and have no clue what I will do! I can’t handle fruity flavors for a 6 am workout!!!

Jun 28, 2020
Verified Buyer
  • 10 Juicy Strawberry Burst

This is the absolute king of pre-workouts in my opinion because of the dial-the-intensity approach, 50 mg of caffeine per scoop, that's perfect. The Juicy Strawberry flavor is frankly outstanding and is the best I've ever tried. I wish that flavor was available in larger container sizes.

Jun 28, 2020
Verified Buyer

Sorry if the coffee series is discontinued I will look to see if another brand can fit the need.

Jun 24, 2020
Verified Buyer
  • 10 Juicy Strawberry Burst

Great product. Tastes great and works for what I need. If anything I wish they made Juicy Strawberry Burst in a bigger size. Never had any shipping issues with and their customer service has always been super helpful.

4 Sizes
65 Servings
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6 Flavors
Concord Grape
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Price: $45.99  ($0.71 / Serving)
Flavor Rating: 9.2
Designed to Support Muscle Endurance and Recovery*

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

65 Servings Concord Grape
Supplement Facts
Serving SizeTwoScoops(9g)
Servings Per Container65
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.

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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