Essential Amino Acids

Amino acids are the fundamental building blocks of proteins and play an irreplaceable role in maintaining human and animal health. Among them, essential amino acids (EAAs) cannot be synthesized by the body and must be obtained from diet or supplementation. They are critical for protein synthesis, growth, tissue repair, and overall metabolism.

Key Essential Amino Acids


Amino Acid	Key Functions
L-Lysine	Supports protein synthesis, collagen production, and calcium absorption
L-Methionine	Important for liver health, detoxification, and metabolic balance
L-Tryptophan	Precursor for serotonin, supports mood balance and sleep quality
L-Threonine	Maintains protein balance, supports nervous system and digestive health
L-Valine	Provides energy for muscles, supports recovery and endurance
L-Leucine	Stimulates muscle protein synthesis, supports strength and repair
L-Isoleucine	Enhances energy supply, muscle recovery, and immune function

Major Functions

💪 Protein Synthesis – Building blocks for muscle, tissue repair, and growth
🐟 Animal Nutrition Fortification – Widely used in feed to improve growth performance
🧬 Growth & Development – Essential for children, adolescents, and active individuals
⚡ Energy & Metabolism – Provide fuel for exercise and physical performance

When to take essential amino acid supplements？

There are several times throughout the day when taking essential amino acid dietary supplements can support your body, Arterburn said.

After lifting weights: To make the most of your workout, you may want to supplement with essential amino acids. Bodybuilding and other styles of resistance training can be draining, but these vital nutrients may complement the positive effects of muscle protein synthesis when consumed alone within 30 minutes to 2 hours after a workout.
After endurance workouts: Endurance training—like running, cycling and swimming—can be catabolic, which means it can cause your body to break down muscle and fat. Taking essential amino acid supplements within 30 minutes to 2 hours after long training sessions may help your muscles repair more quickly. (We know what you’re thinking—the last thing you want to do is eat or drink something heavy after a long run. The good news is that essential amino acid dietary supplements are typically lighter on digestion than complete protein sources.)
Between meals or on non-training days: We know that essential amino acids can help facilitate muscle protein synthesis. So, it should come as no surprise that taking them regularly at any time of day can provide your muscles with a steady supply of extra support.

Suitable For

Sports nutrition – Athletes, bodybuilders, and fitness enthusiasts
General wellness – Individuals looking to maintain protein balance and muscle health
Animal nutrition industry – Feed manufacturers, livestock, aquaculture, and poultry farms
Healthcare & pharmaceuticals – Formulation of amino acid supplements or medical nutrition products