Best Amino Acid Supplements for Working Out

Updated January 11, 2019

After your workout, your body is craving amino acids in order to repair and rebuild your hard trained muscles. Getting the right aminos into your system as quickly as possible is paramount. That means that you need an efficient delivery system and the most effective dosage to get results fast. In this article, we bring you the 10 best amino acid supplements on the 2019 market.

A Quick Glimpse at the Top 10

The best amino acid supplements for muscle growth are NOW Foods Amino Complete, which deliver a complete amino acid profile, clinically dosed and provided with a fast delivery system. The second best amino acids for muscle building are BSN Amino X, with its 10 grams of BCAA’s per serve, is completely caffeine free and comes in 5 great flavors.

Rounding out our top 3 is Sheer BCAA Capsules, which provides you with BCAAs in the most desired 2:1:1 ratio, is preservative free and comes with a 100% guarantee.

To make it easy for you to compare the best amino acid supps, we’ve rated each of the Top 10 on the basis of price and effectiveness. We’ve then given each one an overall rating out of 5. In the next section, we go in depth on each product.

The Top 10 Amino Acid Supplements

#1. NOW Foods Amino Complete

Amino Complete Capsules

NOW Foods Amino Complete delivers a balanced blend of protein and amino acids. It is provided in capsule form to provide a faster delivery into the bloodstream. The proprietary blend of essential amino acids is sourced from whey protein isolate, soy protein isolate, L-Glutamine, L-Arginine, Sodium Caseinate, L-Ornithine and Gelatin. All of the essential amino acids are in the correct dosages to infuse muscle growth. In addition, non essential amino acids are also clinically dosed.

NOW Foods Amino Complete is free of sugar, salt, starch, yeast, wheat gluten and corn and contains no preservatives. It is manufactured in the United States in a GMP compliant facility.


  • Complete amino acid profile
  • Fast delivery system
  • Clinically dosed


  • Contains soy

#2. BSN Amino X

AMINO X Endurance & Recovery Powder

BSN Amino X is a stimulant free amino acid complex designed to fast track premium quality aminos to your muscle cells post workout. It provides 10 grams of branch chain amino acids in the 2:1:1 ratio of leucine to iso-leucine and valine. It also includes clinical dosages of such key amino acids as L-Alanine, L-Citrulline and Taurine. This product, which is provided in powder form, comes in 5 refreshing and great tasting flavors.

BSN Amino X is a caffeine free product that mixes well in water, providing a smooth, refreshing tasting drink.


  • 10 grams of BCAAs
  • Caffeine free
  • 5 great flavors


  • Quite expensive

#3. Sheer BCAA Capsules

Sheer BCAA Branched Chain Amino Acids Supplement

Sheer BCAA Capsules delivers a potent bend of the three branch chain amino acids, leucine, valine and iso-leucine. Research has shown that the ideal ratio for muscle growth is to double the amount of leucine compared to the other two BCAAs. That is why Sheer BCAA capsules are dosed at a 2:1:1 ratio. These aminos are delivered in easy to digest capsule form, allowing them to get into your bloodstream faster.

There are no additives or preservatives in Sheer BCAA Capsules. Your purchase is protected by a 100% no questions asked guarantee.


  • 2:1:1 ratio
  • 100% guarantee
  • No preservatives


  • May cause slight stomach upset

#4. Naturo Nitro Atlas BCAA

Atlas BCCA Powder

Naturo Nitro Atlas delivers the branch chain amino acids in a great tasting powder that enhances protein synthesis. It features a 2:1:1 ratio of leucine, iso-leucine and valine for maximum muscle build and repair. This product is ideal for pre, intra or post workout use. It mixes instantly with water, so you don’t have to contend with clumpiness or a gritty residue.

Naturo Nitro Atlas is completely sugar free and comes in a great lemon-lone flavor. This eliminates the slightly harsh after-taste that comes with unflavored BCAA powder.


  • 2:1:1 BCAA ratio
  • Sugar free
  • Great flavor


  • Contains sucrose

#5. Optimum Nutrition BCAAs

BCCA Amino Acids Capsules

Optimum Nutrition BCAA capsules comes in easy to digest capsule form to allow the ingredients to get into your bloodstream as quickly as possible. It is dosed in the scientifically recommended dosage of 2:1:1 in relation to leucine, valine and iso-leucine. You get a full 1000 mg of BCAAs per serving. There are no preservatives or artificial flavorings in this product. They are also lactose free.

Optimum Nutrition BCAA capsules are an ideal, easy to swallow muscle building booster that can be used before, during your after your workout in order to fast track the muscle building process.


  • Easy to digest capsule form
  • 2:1:1 ratio
  • No preservatives


  • Have to take too many capsules to get 5 gram dosage

#6. BPI Sports Best BCAA Powder

Best BCAA Powder

BPI Sports Best BCAA Powder makes use of an innovative delivery system to get into the muscle cell faster than ever. The three branch chain amino acids, leucine, valine and iso-leucine are bonded together to allow for a faster absorption rate. This helps to reduce protein catabolism, reducing post workout soreness and speeding up the anabolic process. This product also includes a CLA matrix blend, which boosts fat burning while preserving muscle mass.

BPI Sports Best BCAA Powder makes use of cutting edge flavor technology to deliver some great flavors without the addition of sugars or artificial fillers.

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  • 2:1:1 BCAA ratio
  • CLA matrix
  • Faster absorption


  • Tastes too sweet

#7. Country Life Max Amino with Vitamin B6

Max-Amino with Vitamin B-6

Country Life Max Amino with added Vitamin B6 is a complex that contains 18 different free form amino acids designed to deliver the building blocks of protein synthesis and resultant muscle growth. The blend contains leucine, which is by far the most important amino acid for muscle growth. The other amino acids also influence mood, reduce stress and promote immune system health. 

Country Life Amino comes in the form of vegetarian capsules. You get 180 capsules in each container. There is no wheat, no milk, no gluten and no artificial colors in this product. 


  • 18 different amino acids
  • Contains no GMO’s
  • Certified gluten free


  • Capsules give off an odor

#8. Cellucor Alpha Amino

Alpha Amino Recovery Powder

Cellucor Alpha Amino is a performance, hydration and energy enhancement powder. It is designed to power you through your workouts while infusing muscle building amino acids into your cells. It includes 14 amino acids, including the branch chain amino acids in a 2:1:1 ratio of leucine to valine and iso-leucine. There are three types of leucine to super-charge the effect of this key amino for muscle building.


  • 14 amino acids
  • 2:1:1 BCAA ratio
  • 3 types of leucine


  • May cause bloating

#9. CytoSport Monster Amino

Monster Amino 6:1:1 Supplement

CytoSports Monster Amino Acids is a caffeinated amino acid supplement that is delivered in powder form. It includes caffeine to provide you with a powerful pre workout energy boost. The branch chain amino acids are included at the ratio of 6:1:1 relating to leucine, valine and iso-leucine. This dosage supercharges your body’s muscle building ability.

CytoSports Monster Amino mixes easily with water to provide a smooth, tasty drink and comes in a variety of great tastes. It is NSF certified for sport and is manufactured in the United States under a GMP authorized facility.


  • Contains caffeine
  • 6:1:1 BCAA ratio
  • Mixes easily


  • Bitter after taste

#10. Scivation Xtend BCAAs

Xtend BCAA Powder

Scivation Xtend BCAAs is an advanced branch chain amino acid powdered drink that delivers a full 7 grams of BCAAs per serving. The three BCAAs are delivered at the clinically proven ratio of 2:1:1 in favor of leucine. You also get 2.5 grams of glutamine and 1 gram of citrulline malate. In addition, essential hydration inducing electrolytes ensure that you are consistently hydrated.

Scivation Xtend BCAAs is a calorie free way to infuse your muscle cells with anabolic amino acids. It does so by way of a delicious water based drink that mixes reliably and goes down easily.

Find out the best workout supps across all categories with our  Workout Supplements That Actually Work 2019 super feature article.


  • 7 grams of BCAAs
  • 6:1:1 BCAA ratio
  • Calorie free


  • May clump in the container


The best amino acids for working out are NOW Foods Amino Complete, providing you with all of the key aminos for muscle growth in a very effective delivery system. We also loved BSN Amino X, which delivers 10 grams of BCAA’s in each dose, is completely caffeine free and comes in 5 great flavors. The third best amino acid pill is Sheer BCAA Capsules, which delivers the BCAAs in a 2:1:1 ratio, and offers a 100% money back guarantee.

NOW Foods Amino Complete

Our #1. Recommendation

NOW Foods Amino Complete

jim roose

My name is Jim Roose. I'm a former competitive power lifter and gym owner. I've bought millions of dollars of fitness equipment over the last 20 years. This site is my way of giving back to the fitness community that's done so much for me. Every article on here is carefully researched and written by me. Leave a comment if you have any questions.