MusclePharm Amino Acid Supplement

Amino acid supplements are dietary supplements that contain amino acids, which are the building blocks of proteins. The human body requires 20 different amino acids to grow, function, and maintain good health. While the body can produce many of these amino acids on its own, there are nine essential amino acids that must be obtained through the diet.

Amino acid supplements come in various forms, including individual amino acids, complex formulations containing multiple amino acids, or specific blends designed for certain purposes. They can be derived from natural sources like animal proteins or synthesized in laboratories.

The top 9 Amino Acid Supplements

Product name Image Rating Pros Cons Best Price More information

MusclePharm Amino Acid Supplement

MusclePharm Amino Acid Supplement
  • Patented 3:1:2 BCAA ratio
  • Promotes muscle development and recovery
  • No artificial dyes
  • Unflavored version might be difficult to mix with beverages
  • Some users report a chalky taste
  • Might clump if not stored properly
Coming Soon!

BULKSUPPLEMENTS BCAA Branched Chain Amino Acids

BULKSUPPLEMENTS BCAA Branched Chain Amino Acids
  • Quick results
  • Offers a cost-effective bulk option
  • Can be mixed with other supplements
  • Comes in a simple bag, not a tub or container
  • Unflavored and might be bitter
  • No scoop provided for measurement
Coming Soon!

Optimum Nutrition Amino Energy Drink

Optimum Nutrition Amino Energy Drink 5 star review
  • Combines amino acids with caffeine for energy
  • Available in various flavors
  • Can be used as a pre-workout or daily energy booster
  • Contains artificial sweeteners
  • Not suitable for those sensitive to caffeine
  • Some users might find it too sweet
Coming Soon!

XTEND Original BCAA Powder

XTEND Original BCAA Powder
  • uses a 2:1:1 ratio of Leucine to Isoleucine to Valine
  • Contains added electrolytes, which can assist with hydration
  • Comes in a wide range of flavors
  • Zero sugars & Zero calories
  • May contain artificial sweeteners
  • Some find certain flavors too strong
  • High-quality BCAA supplements can be more expensive than other protein or amino acid sources
Coming Soon!

NOW Sports Amino Acids Complete

NOW Sports Amino Acids Complete
  • Comprehensive blend of amino acids
  • Suitable for vegetarians
  • No harmful additives
  • Pills might be large for some users
  • Some might prefer a flavored drink mix
  • Requires multiple capsules for a full serving
Coming Soon!

Dymatize All9 Amino Acids

  • Contains all 9 essential amino acids
  • Available in various flavors
  • Supports muscle protein synthesis
  • Some users find certain flavors too sweet
  • Contains artificial colors and flavors
  • Might be more expensive than basic BCAA supplements
Coming Soon!

NAKED nutrition Naked BCAAs Amino Acids

NAKED nutrition Naked BCAAs Amino Acids
  • Only two ingredients with no additives
  • Vegan and GMO-free
  • 2:1:1 BCAA ratio
  • Unflavored and might not taste great on its own
  • No additional amino acids or nutrients
  • Some users report mixing issues
Coming Soon!

Amino Slim - Slimming BCAA

Amino Slim - Slimming BCAA Amino Acids
  • Combines BCAAs with collagen for skin and joint health
  • Includes saffron for mood support
  • Keto-friendly
  • More expensive due to added ingredients
  • Some users might not want collagen in their BCAA supplement
  • Specific taste due to collagen
Coming Soon!

Animal Juiced Amino Acids

Animal Juiced Amino Acids
  • Combines BCAAs with additional amino acids
  • Designed for muscle endurance and recovery
  • Trusted brand in the bodybuilding community
  • Contains artificial colors and sweeteners
  • Might be more expensive than simpler formulas
  • Some users might not prefer the "proprietary blend" approach
Coming Soon!

More on BCAA’s

One of the primary uses of amino acid supplements is to support muscle growth and repair. Bodybuilders and athletes often take these supplements to boost protein synthesis in the body, helping the muscles recover and grow after intense physical activity. When muscles are used during exercise, tiny tears occur, and amino acids play a crucial role in repairing these tears, leading to muscle growth.

In addition to muscle growth, amino acid supplements are also used to enhance athletic performance. Some amino acids, like beta-alanine and arginine, are known to improve exercise endurance, increase blood flow to muscles, or buffer the effects of muscle acidosis, which can lead to improved performance during short-duration, high-intensity activities.

Outside of the realm of athletics and bodybuilding, amino acid supplements can serve various health purposes. For instance, the amino acid tryptophan is a precursor to serotonin, a neurotransmitter that plays a role in mood regulation. Therefore, tryptophan supplements are sometimes used to address mood disorders or to improve sleep quality, given that serotonin can be converted to melatonin, a hormone that regulates sleep.

The History of Amino Acid Supplements

The history of amino acid supplements is deeply intertwined with the development of nutritional science and sports medicine. The discovery and understanding of amino acids began in the early 19th century, but it wasn't until the mid-20th century that the importance of amino acids for human health became widely recognized. This led to the development of amino acid supplements, initially targeted towards athletes for muscle building and recovery.

Over time, their use expanded as more was learned about their role in various bodily functions, leading to a wide range of supplements aimed at improving general health, enhancing athletic performance, and aiding in conditions like muscle wasting. Today, amino acid supplements are a key part of nutrition and health regimes for many people.

Ingredients of Amino Acid Supplements

Amino acid supplements typically contain a variety of essential and non-essential amino acids. Essential amino acids, which the body cannot produce on its own, include leucine, isoleucine, valine (often found together as BCAAs), lysine, methionine, phenylalanine, threonine, tryptophan, and histidine. Non-essential amino acids, which the body can produce, like alanine, aspartic acid, and glutamic acid, are also commonly included. Some supplements may add additional ingredients such as vitamins, minerals, and flavorings to enhance their nutritional value and taste.

Who should take Amino Acid Supplements

Amino acid supplements are particularly beneficial for athletes and bodybuilders for muscle building and recovery. They are also useful for people with dietary restrictions or deficiencies, such as vegetarians or vegans, who might not get enough essential amino acids from their diet. Individuals recovering from surgery or illness, as well as elderly people experiencing muscle loss, may find these supplements helpful. Additionally, those seeking to improve overall wellness and nutrition might incorporate amino acid supplements into their diet. However, it's important for individuals to consult with healthcare professionals before starting any supplementation, especially if they have underlying health conditions or are taking other medications.

What Amino Acid Supplements is NOT intended for

Amino acid supplements may not be suitable for everyone. People with kidney or liver disease should be cautious as excess amino acids can strain these organs. Pregnant or breastfeeding women should also consult a healthcare provider before using these supplements. Individuals with certain metabolic disorders, where processing amino acids is problematic, should avoid them. Additionally, those who already consume a protein-rich diet might not need extra amino acids, and overuse could lead to imbalances or health issues. It's always best to consult with a healthcare professional before starting any new supplement regimen.

Pros and Cons of Amino Acid Supplements


  • Enhanced Muscle Growth: Ideal for bodybuilders and athletes to support muscle building and recovery.
  • Improved Exercise Performance: Can increase endurance and reduce fatigue during workouts.
  • Supports Recovery: Helps in faster recovery from injuries or surgeries by aiding tissue repair.
  • Aids in Weight Loss: Can enhance metabolism and aid in reducing body fat in conjunction with exercise.
  • Vegetarian and Vegan Friendly: Provides essential amino acids that might be lacking in plant-based diets
  • Mood Regulation: Some amino acids play a role in neurotransmitter production, potentially improving mood and cognitive function.
  • Supports Immune Function: Essential amino acids are crucial for a healthy immune system.
  • Helps Prevent Muscle Loss: Especially beneficial for the elderly to maintain muscle mass and strength.


  • Potential Strain on Kidneys: Excessive use can burden kidneys, especially in those with pre-existing conditions.
  • Imbalance of Amino Acids: Overconsumption may lead to an imbalance, affecting metabolic processes.
  • Interaction with Medications: May interact with certain medications, necessitating a doctor's consultation
  • Not Suitable for Certain Conditions: People with liver disease, kidney disease, or certain metabolic disorders should avoid them.
  • Allergic Reactions: Rare, but possible allergic reactions to certain amino acid compounds.
  • Cost: Can be expensive, especially for high-quality products
  • Nutritional Redundancy: Those with a balanced diet may not need additional supplementation.
  • Regulatory Oversight: Dietary supplements are not as tightly regulated as pharmaceuticals, leading to potential quality issues.

Studies regarding Amino Acid Supplements

Essential Amino Acids (EAAs):

  1. Title: Effect of Amino Acid Supplementation on Muscle Mass and Strength Gain in Young and Older Adults:
  • Key findings: This study found that EAA supplementation combined with resistance training significantly increased muscle mass and strength in both young and older adults compared to placebo.
  1. Title: Branched-Chain Amino Acid Supplementation Improves Cognitive Function in Middle-Aged Men:
  • Key findings: This study showed that BCAA supplementation improved cognitive function and memory in middle-aged men compared to placebo.

Branched-Chain Amino Acids (BCAAs):

  1. Title: The Effects of Branched-Chain Amino Acid Supplementation on Exercise Performance and Recovery in Athletes:
  • Key findings: This review suggests that BCAA supplementation may improve exercise performance and reduce muscle soreness in athletes, particularly during endurance training.
  1. Title: Branched-Chain Amino Acids and Muscle Wasting in Chronic Liver Disease:
  • Key findings: This study suggests that BCAA supplementation may help reduce muscle wasting in individuals with chronic liver disease.

Specific Amino Acids:

  1. Title: L-Arginine Supplementation Improves Exercise Performance and Blood Flow in Adults with Peripheral Artery Disease:
  • Key findings: This study showed that L-arginine supplementation improved exercise performance and blood flow in individuals with peripheral artery disease.
  1. Title: L-Citrulline Supplementation Improves Cardiovascular Function and Exercise Performance in Healthy Adults:
  • Key findings: This study found that L-citrulline supplementation improved cardiovascular function and exercise performance in healthy adults.
  1. Title: N-Acetyl-L-Cysteine Supplementation Improves Symptoms of Depression in Adults with Major Depressive Disorder:
  • Key findings: This study suggests that N-acetyl-L-cysteine supplementation may improve symptoms of depression in adults with major depressive disorder.
  1. Title: L-Glutamine Supplementation Improves Gut Health and Immune Function in Athletes:
  • Key findings: This study found that L-glutamine supplementation may improve gut health and immune function in athletes.
  1. Title: L-Lysine Supplementation May Reduce Anxiety:
  • Key findings: This study suggests that L-lysine supplementation may help reduce anxiety symptoms in some individuals.
  1. Title: Glycine Supplementation Improves Sleep Quality:
  • Key findings: This study suggests that glycine supplementation may improve sleep quality and duration in some individuals.

Frequently Asked Questions: Amino Acid Supplements

What are amino acids and why are they important?

Amino acids are organic compounds that combine to form proteins, which are essential for various bodily functions. They are often referred to as the building blocks of proteins. Amino acids play critical roles in:

  • Protein Synthesis: Necessary for growth, repair, and maintenance of tissues.
  • Enzyme Production: Enzymes that catalyze biochemical reactions in the body.
  • Neurotransmitter Function: Some amino acids act as precursors for neurotransmitters, affecting mood and cognitive function.
  • Metabolic Processes: Involved in energy production and regulation of metabolism.
  • Immune Function: Essential for producing antibodies and other immune system components.

There are 20 amino acids, nine of which are essential and must be obtained through the diet, as the body cannot synthesize them.

What are the benefits of taking amino acid supplements?

Amino acid supplements offer various benefits, including:

  • Muscle Growth and Repair: Particularly beneficial for athletes and bodybuilders for post-exercise recovery.
  • Enhanced Exercise Performance: Can reduce fatigue and improve endurance during workouts.
  • Weight Management: Supports fat loss by preserving lean muscle mass during calorie-restricted diets.
  • Improved Mood and Cognitive Function: Certain amino acids, like tryptophan, are precursors to neurotransmitters that regulate mood.
  • Better Immune Function: Supports the production of immune cells and proteins.

Supplementing with amino acids can help individuals meet their protein needs, especially if their diet is lacking in protein-rich foods.

What are the different types of amino acid supplements?

Amino acid supplements come in various forms:

  • Essential Amino Acids (EAAs): Supplements that contain all nine essential amino acids.
  • Branched-Chain Amino Acids (BCAAs): Focus on three specific amino acids—leucine, isoleucine, and valine—that are particularly important for muscle protein synthesis.
  • Individual Amino Acids: Supplements that provide a single amino acid, such as glutamine, arginine, or tryptophan, targeting specific benefits.
  • Protein Powders: Contain complete proteins that break down into amino acids.

Each type serves different purposes, and the choice depends on individual health and fitness goals.

How do branched-chain amino acids (BCAAs) benefit athletes and bodybuilders?

BCAAs—leucine, isoleucine, and valine—are especially beneficial for athletes and bodybuilders because they:

  • Promote Muscle Protein Synthesis: Leucine, in particular, plays a key role in initiating muscle protein synthesis.
  • Reduce Muscle Soreness: Decrease muscle damage and soreness after intense exercise.
  • Prevent Muscle Breakdown: Help preserve muscle mass during prolonged exercise or calorie-restricted diets.
  • Enhance Performance: Reduce exercise-induced fatigue by maintaining energy levels during workouts.

BCAA supplements are often taken before, during, or after workouts to maximize these benefits.

Are there any side effects of taking amino acid supplements?

Amino acid supplements are generally safe for most people when taken as directed. However, potential side effects can include:

  • Digestive Issues: Nausea, bloating, or diarrhea, particularly with high doses.
  • Imbalance: Excessive intake of one amino acid can lead to imbalances and affect the absorption of others.
  • Kidney Strain: High protein intake, including amino acids, can strain the kidneys, especially in individuals with pre-existing kidney conditions.
  • Allergic Reactions: Rarely, some people may experience allergic reactions to certain amino acids.

It’s important to follow recommended dosages and consult a healthcare provider before starting any new supplement regimen.

Can amino acid supplements help with weight loss?

Amino acid supplements can aid in weight loss by:

  • Preserving Lean Muscle Mass: Helps maintain muscle during calorie-restricted diets, which is crucial for a healthy metabolism.
  • Promoting Satiety: Some amino acids can increase feelings of fullness, reducing overall calorie intake.
  • Enhancing Fat Loss: Certain amino acids, like carnitine, help in the mobilization and burning of fat for energy.

While amino acids can support weight loss efforts, they should be combined with a balanced diet and regular exercise for best results.

What is the best time to take amino acid supplements?

The timing of amino acid supplements can depend on the desired outcome:

  • Pre-Workout: Taking BCAAs or EAAs before exercise can help enhance performance and reduce muscle breakdown.
  • Post-Workout: Consuming amino acids after exercise aids in muscle recovery and growth.
  • Before Bed: Certain amino acids, like glutamine or arginine, taken before bed can support overnight muscle repair and growth.

Consistency is key, and supplements should be taken according to individual goals and as directed by the manufacturer or a healthcare provider.

Can amino acid supplements replace protein powder?

Amino acid supplements can complement but not necessarily replace protein powder. While amino acids provide the building blocks for protein synthesis, protein powders offer a more comprehensive source of protein, including:

  • Complete Protein Profile: Protein powders typically contain all essential amino acids in balanced proportions.
  • Convenience: Protein powders are an easy way to increase protein intake quickly.
  • Additional Nutrients: Many protein powders are fortified with vitamins, minerals, and other beneficial ingredients.

For overall protein intake, protein powders are usually preferred, while amino acid supplements can target specific needs or enhance certain aspects of nutrition and performance.

How do essential amino acids (EAAs) differ from branched-chain amino acids (BCAAs)?

  • Essential Amino Acids (EAAs): Include all nine amino acids that the body cannot synthesize and must be obtained from the diet (histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine).
  • Branched-Chain Amino Acids (BCAAs): Comprise three of the nine EAAs (leucine, isoleucine, and valine) that are particularly important for muscle metabolism.

EAAs provide a more comprehensive supplement for overall protein synthesis, while BCAAs are specifically targeted for muscle recovery and performance.

Are amino acid supplements suitable for vegetarians and vegans?

Yes, many amino acid supplements are suitable for vegetarians and vegans. Plant-based sources of amino acids include:

  • Soy: A complete protein source containing all essential amino acids.
  • Pea Protein: Rich in essential amino acids, especially lysine.
  • Rice Protein: Often combined with pea protein to provide a complete amino acid profile.
  • Hemp Protein: Contains all essential amino acids, though in lower amounts compared to soy or pea protein.

When choosing amino acid supplements, vegetarians and vegans should look for products that are specifically labeled as plant-based or vegan to ensure they meet dietary preferences.