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Best Amino Acids

Best Overall
OPTIMUM NUTRITION Preworkout and Essential Amino Acids
  • » Has caffeine from green tea and/or coffee
  • » Helps in keeping and boosting energy

Best Budget
21st Century Daily Amino Acid Tablets
  • » Supports the muscles
  • » Affordable and budget-friendly

Best Amino Matrix
ALR Industries Humapro - Protein Matrix Formulated for Humans
  • » Vegan-friendly and free of gluten
  • » Supports GI health

Written by James Cooper
Last Updated
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Those supplementing with the best amino acids offer an extra boost of nutrition to the muscles. Brand chain amino acids or BCAAs are the building blocks of protein. They are used to supplement protein intake in physical training, athletic training or for anyone who needs to maintain or improve muscle mass.

Essential and non-essential amino acids can be found in foods such as meat, dairy, and eggs. But they can also be isolated in supplements. The 20 amino acids found in protein are categorized by their nature.

Essential amino acids

  • Arginine
  • Histidine
  • Isoleucine
  • Leucine
  • Lysine
  • Methionine
  • Phenylalanine
  • Threonine
  • Tryptophan
  • Valine

Non-essential amino acids

  • Alanine
  • Asparagine
  • Aspartate
  • Cysteine
  • Glutamate
  • Glutamine
  • Glycine
  • Proline
  • Serine
  • Tyrosine

The amino acids which can’t be produced by the human body need to come from good. Supplements are also based on food sources. Here are the best amino acids in a pure micronized form.

See also:

Best Creatine
Best Nootropics
Best Collagen Supplements

  • 1

    OPTIMUM NUTRITION Preworkout and Essential Amino Acids

Achieve optimum energy and mental focus all throughout the day with OPTIMUM NUTRITION. This amino blend is packed with amino acids to aid in muscle recovery after every workout. It also has 100 milligrams of caffeine from green tea and/or green coffee that helps in keeping and boosting your energy level even after your workout.

This supplement has a unique formula that keeps you stay focused and alert in the morning and supports you with your training or workout in the afternoon. With only 18 calories per serving, 1 gram of carbs, and no sugar, OPTIMUM NUTRITION offers more than 10 flavors to choose from, depending on your taste, making it more fun and enjoyable to take.

OPTIMUM NUTRITION is easy to make: just mix two scoops into 10-12oz. of cold water; it instantly mixes with water so you do not have to worry about residues. The two scoops contain 100 mg of caffeine; exceeding 6 scoops within a 4-hour period could be dangerous. As always, consult with your physician first before taking any supplements.


Comes in 10+ flavors

Energy blend with 100 milligram of caffeine coming from green tea and/or green coffee extracts

No sugar added


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  • 2

    21st Century Daily Amino Acid Tablets

Build and repair muscles without compromising your finances. The amino acid tablet from 21st Century is Amazon’s Choice for amino acid supplements that not only support your muscles but also your budget. This supplement is packed with a combination of important amino acids that help your body build and repair muscle tissues, as well as daily amino acids for maximum strength.

The tablets are also easy to swallow with no after-taste while delivering all the amino acids needed daily. It also helps in boosting your energy which allows you to do more all throughout the day. Use this you’re looking to gain some weight quickly, use this supplement along with protein. It is safe to take, and at $12.90, you will surely get your money’s worth.


Budget friendly

Easy to swallow tablet

No after-taste


No flavored option

  • 3

    ALR Industries Humapro - Protein Matrix Formulated for Humans

Get the best results and create superior health with HumanPro by ALR Industries. This amino acid has the optimal ratio for human absorption and beats whey protein lean mass gains by 501% with 83% less toxic waste. It is also 100% pre-digested, so you never have to worry about having GI discomfort or bloating. If you are vegan or allergic to gluten, this supplement is perfect for you because it does not contain gluten, soy, sugar, lactose, or heavy metals. It only also has 1 calorie per serving (that’s 0.004 calories per gram).

Coupled with proper diet and exercise, HumanPro helps in losing body fat and gaining muscles because of the effective and efficient absorption over all other forms of protein.

This supplement also comes in different flavors making it more fun and enjoyable to take. It also comes in tablet forms for those who do not prefer drinking this in juice form.



Does not contain gluten, soy, sugar, lactose, or heavy metals

Optimal ratio for human absorption and beats whey protein lean mass gains by 501%


Tablets may be too large to swallow for some

Warning label is not highlighted

  • 4

    Power Amino Acids - Factor4 Weight Control®

If you’re looking to lose weight, one of the most effective ways is to curb your diet, and one way to do it is by taking power amino acids from Factor4. This supplement help control your appetite for sugar, salt, and fat including red meat, desserts, fast food, and tasty snacks. Factor4 supports by providing the feeling of satisfaction even when caloric intake is reduced and junk food removed from your daily diet.

This supplement also helps in building your muscle tissues which increases your energy, endurance, and stamina during any performance or workout while effectively burning extra and unwanted fats.


Curbs appetite for processed foods that are enriched in sugar, salt and fat

Helps in burning fats and building muscles

Good for health and better sleep


Limited flavor

  • 5

    Myogenix Aftershock 2.64Lb

Take a break from your usual protein supplements and try the Myogenix Aftershock Fruit Punch. This supplement is the key to unlocking unlimited muscle growth through the anabolic window by giving your body the proper nutrition.

The powder supplement mixes well even in room temperature water, so having lumps on your drink will never be a problem. The Myogenix Aftershock Fruit gives a good feeling after working out making your less prone to aches. It also has four flavors to choose from to suit your taste and gives you a refreshing feeling: fruit punch, shockolate milks, orange avalanche, and wildberry blast.


Helps maximize the anabolic window

Different flavors to choose from

Helps in giving a good feeling pre-workout


A bit protein-heavy

  • 6

    Purbolics Aminos 4g of Free-Form Amino Acids

Ultimately designed with 4 grams of free-form amino acids, the Purbolics Aminos has the ultimate hydration formula that allows your body to fully recover after a workout. This supplement comes in powder and candy form, but this featured variant is in rainbow-colored candies. So if you have a sweet tooth but health-conscious and don’t want to put on weight, you will enjoy this. You can say goodbye to your chalky flavored drinks.

Do more each and every single day and be empowered with Purbolics. Stay focused on doing what’s best to achieve your body goals and the best version of yourself without feeling forced to do it; enjoy your journey and have fun along the way with Purbolics Aminos.


Comes in powder and rainbow-colored candies

Zero sugar and zero calories

Has 4 grams of free-form amino acids for hydration


The taste does not suit everyone

  • 7

    GNC AMP Pure Isolate

Never let anything block your athletic goals; take GNC AMP Pure Isolate with 25 grams of protein that delivers 19 grams of amino acids to support your muscles, 5 grams of BCAA including Isoleucine, Valine, and Leucine, helping in the growth and repair of muscle tissue, and 1 gram Creatine building blocks.

One can never go wrong in picking this supplement. Since 1935, GNC has dedicated to providing the highest standards when it comes to nutritional science; it is high-quality, safe, and effective. Give that fuel your body needs to help in energy circulation during intense activity.

The arginine in this supplement is one of the aminos involved in the formation of creatine that plays an essential role in protein synthesis. GNC Pure Isolate is the drive your body needs to fully achieve your athletic goals while consuming only half the sugar, half the fat, half the cholesterol, and with lower carbohydrates.


Micro-filtered, fast-digesting whey protein isolate powder that delivers 25g protein, 5g BCAA and 0g sugar per 1-scoop serving

Using over 20 steps in a sophisticated process to maximize protein quality

Highest standards of quality, safety and efficacy


A bit expensive

The cookies & cream flavor does not taste well for some

  • 8

    Hardbody OMG Pre-Workout Drink for Men and Women

Looking for a pre-workout drink that will make you go OMG? Try Harbody’s OMG Pre-Workout Drink that’s delicious and packed with safe and premium ingredients. Hardbody’s OMG Pre-Workout Powder is the leading Premium Workout Supplement on the market today. Backed by science, this supplement only uses a premium and a special formula that’s delicious and gets you motivated to fulfill your workout regimen and goals.

This drink provides the necessary extra energy and rejuvenating muscles to help in maximizing your workouts to its highest level of performance. It is great for both men and women that helps in suppressing your appetite for junk food, enjoy healthier meals, and workout more often for a longer period of time. OMG supplement does all of this naturally and also helps you in losing weight quickly and effectively.

Be physically and mentally ready for your daily regimen and pick Hardbody’s OMG Pre-Workout Drink today!


Uses all-natural ingredients inspected by FDA

Helps in avoiding cravings for junk food

100% money back guarantee

Comes in 4 exciting flavors


Made with caffeine

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  • 9

    Beyond Raw LIT AF

Power through your most extreme workout with Beyond Raw’s advanced formula pre-workout supplement. This supplement is free of gluten and sugar and delivers immediate energy and a second matchless surge.

In every serving of Beyond Raw LIT AF pre-workout supplement, you get 300 mg caffeine, 8g L-Citrulline Malate, 2g micronized creatine, and 1.5g nitrosigine. It also includes 400mg of Peak ATP and 3.2g of Carnosyn Beta Alanine in each serving. Every dose provides the needed boost to ignite your motivation to push through your limits to achieve the results you have been wanting.


Great taste and perfect level of beta alinine

Free of gluten and sugar

Affordable formulation


Caffeine content is a bit strong

  • 10

    MusclePharm Essentials BCAA Powder, Post-Workout Recovery Drink

Support lean muscle growth, reduce muscle breakdown and increase protein synthesis with the MusclePharm Essentials BCAA Powder. This supplement offers what they call a unique ratio of 3 Leucine, 1 Isoleucine, and 2 Valine that are perfectly tuned to help in all phases of muscle development and maintenance. This formulation was developed to help in releasing amino acids before and after every workout.

This supplement also aids in reducing damages in the muscles while working out while assisting in the increase of lean body mass. Taking this BCAA powder will help you get moving and finally start your working out and giving you that result you have been looking for.

Take this formula to help you have that drive to start and to get that muscle repair and building effect after while your body is recovering without feeling sore or tired. This high-quality BCAA has a very fine powder that dissolves quickly and mixes well with water without the lumps, and with excellent fruit punch flavor.


Convenient powder form that dissolves fast

Does not include any banned substance

100% money back guarantee


Great taste but only comes in one flavor

Too sweet for some users

  • 11

    Nutricost BCAA for Women

Formulated specifically for women, this BCAA from Nutricost has an optimum blend for a zero-calorie source of amino and industry-proven 2:1:1 ratio. It has been 3rd party tested and proven to be non-GMO and free of gluten.

The ingredients included in this supplement help in after-workout recovery and give enough energy for before and after. Some users also claim that this product is great for their hair, skin, and nails. It tends to be sweet, so those with a sweet tooth will love this BCAA supplement. This product is also great if you want to feel well-rested and refreshed, making you want to take on what’s in store for you the next day.

The Nutricost BCAA is a great companion for women to use every after workout for a perfect and effective recovery. This supplement comes in five different flavors in three different sizes that you can try alternately depending on your preference.


Packed with essential vitamins

Comes in 5 different flavors

With 3 sizes to choose from


Formulated only for women

Could be too sweet for some

  • 12

    RSP BCAA 5000 Premium BCAA Powder

Help your muscles recover faster and increase endurance with the premium BCAA powder from RSP. By taking this supplement, you will notice more muscular endurance, fatigue will diminish, and your muscle recovery will improve. These are all essential parts of your post-workout or training routine.

This supplement also helps in maintaining an efficient immune function and effective in supporting existing muscle tissue preservation. The BCAA from RSP has a 2:1:1 ratio that provides the ideal combination of Leucine, Isoleucine, and Valine that support the needed post-workout muscle recovery, protein synthesis, and decrease of exhaustion. This formulation also helps you get ready for your next training or workout with just 5g of premium BCAA per serving; that’s a combination of energy and recovery in one.

RSP has developed this premium product through research and a series of tests to verify its efficacy so you never have to worry about its quality.

Push through the toughest workout and arm yourself with the needed boost in your energy that in turn will boost your endurance. Every after workout, you will still get the benefits of BCAA 5000 that accelerate muscle recovery and help retain new muscles that have been built.


Comes in 3 great flavors

Scientifically-proven 2:1:1 ratio

100% tested and GMP certified


Serving size is too large for some

Frequently Asked Questions

What are amino acids?

Amino acids are the building blocks of protein. They are micronized from various foods and used as concentrates in supplements. As a supplement, amino acids cannot aid muscle recovery or muscle growth. But in combination with balanced nutrition, the amino acids come with plenty of visible benefits such as faster recovery.

What are the 3 types of amino acids?

Essential, conditionally-essential and non-essential amino acids can be distinguished by category. The first two categorizes haven been described above. However, conditionally-essential amino acids are needed in period of stress. These amino acids become essential in demanding periods. They include arginine and glutamine.

What does amino acid do for the body?

Amino acids are the building blocks of protein. But they also support body functions and hormone balance. Some amino acids are produced by the body. Others only come from food. By default, nobody needs to use amino acids supplements. Even athletes can train without taking supplements. But their aiding role improves anyone who’s particularly active.

Why do bodybuilders take amino acids?

Bodybuilders mainly take amino acids for muscle growth. The supplement is normally combined with protein-rich meals. Amino acids can also be combined with creatine and whey protein powder.

But bodybuilders also take amino acids to keep muscles which are hard to build. When going through weight loss phases, they choose amino acids to maintain muscles and only burn body fat. But amino acids are also used in other sports such as running, cycling, and rowing.