Amino Acids

Natural Factors L-Glutamine enhances muscle recovery, energy, and immunity. As a free-form amino acid, it is more effective than the form obtained directly from food. Supplementing with L-glutamine helps restore...

Promotes healthy body composition by helping to convert fat into energy Boosts physical and mental energy Enhances overall well-being by lessening fatigue Improves athletic performance and speeds muscle recovery after...

Antioxidant Improves respiratory health Offers liver support Boosts immune system N-Acetylcysteine (NAC) is a derivative of the amino acid cysteine and offers a range of benefits, from supporting antioxidant defense...

Acetyl-L-carnitine is the biologically active form of the amino acid L-carnitine. It can cross the blood-brain barrier, making it ideal for promoting neurological health. Acetyl-L-carnitine has antioxidant activity and is...

Maintains Cellular Health With Selenium N-acetyl cysteine (NAC) is a stable form of the non-essential amino acid cysteine. It is a sulfur-containing amino acid that acts as a stabilizer for...

Unleash the benefits of Spirulina, a blue-green algae celebrated as the superfood of tomorrow, renowned for its remarkable protein and vitamin profile. Rich in essential nutrients such as beta-carotene, Vitamin...

Helps to Increase Nitric Oxide (NO) production, Increases the blood flow in the body. L-Arginine Increases sperm motility by ATP production. Protects the spermatozoa structure by reducing oxidation stress. Provide...

Promotes Relaxation Healthy Vascular Function With Decaf Green Tea Theanine is a unique amino acid found naturally in the tea plant (Camellia sinensis). Theanine promotes relaxation while maintaining alertness and...

Supports Immune Function Healthy Skin and Lips Helps to reduce the recurrence of cold sores / Herpes Simplex Virus L-Lysine is an essential amino acid that cannot be made by...

Healthy Visual Function Healthy Nervous System Non-GMO Taurine is a conditionally essential amino acid that is not utilized for protein synthesis, but is mainly found free in most tissues, especially...

Natural Factors L-Arginine 500 mg is a non-essential amino acid involved in protein synthesis. It may help support a modest improvement in exercise capacity in individuals with stable cardiovascular disease...

Carnitine assists in fat metabolism and plays an essential role in making fatty acids available for muscle tissue. Carnitine also supports heart health. Supplement FactsEach tablet contains: L-Carnitine (as L-Carnitine...

5-HTP is an amino acid needed to make serotonin. 5-HTP from Natural Factors uses timed-release caplets for a steady increase in serotonin levels that helps promote healthy mood balance. 5-HTP...

Product color: Off-white Healthy Immune System Function. L-Citrulline is a non-essential amino acid that is an important intermediate in the urea cycle, functioning along with other amino acids to rid...

L-Arginine is one of 20 Amino Acids, the building blocks of protein. Arginine supports the effect of exercise and is involved in various important pathways throughout the body. Promotes stamina...

NOW® L-Lysine is a pharmaceutical grade essential amino acid. Supports Healthy Connective Tissue Supports Calcium Absorption Supports Collagen Synthesis Healthy Immune Function Healthy Skin and Lips Helps to reduce the...

Promotes a Calm and Relaxed Mood. Improves Mood and Positive Outlook by relieving Anxiety and Stress Promotes Relaxation of Mind and Body also Supports Better Sleep Quality Weight Loss Support...

Natural Factors L-Arginine is a non-essential amino acid involved in protein synthesis. It may help support a modest improvement in exercise capacity in individuals with stable cardiovascular disease (CVD). As...

Pharmaceutical Grade Healthy Glandular Function Supports Mental Alertness L-Tyrosine is a conditionally indispensable amino acid required for the production of the neurotransmitters dopamine, adrenaline, and noradrenaline, as well as for...

Promotes stamina and performance Supports sexual health Supports vascular health Supports muscle protein synthesis. Supports vasodilation to enhance blood flow Plays a role in heart health May help in erectile...

Supports cardiovascular health Maintains blood flow Arginol contains L-Arginine, which is an amino acid that helps the body make proteins. It can be obtained naturally in the diet and is...

Promotes Relaxation Healthy Vascular Function With Inositol Theanine is a unique amino acid found naturally in the tea plant (Camellia sinensis). Theanine promotes relaxation while maintaining alertness and promotes healthy...

Gamma-Aminobutyric Acid With Vitamin B-6 GABA (Gamma-Aminobutyric Acid) is a non-protein amino acid that functions as a neurotransmitter in the human brain. GABA is naturally produced in the body and...

For Healthy Nervous System. Taurine is an amino acid that plays various important roles in the body. Taurine may help improve heart function and reduce the risk of heart disease...

Super antioxidant Free radical scavenger Detoxifies the body Offers liver support Boosts immune system NAC is a precursor to glutathione, a critical antioxidant scientifically proven to scavenge free radicals. NAC...

5-HTP (a.k.a. 5-Hydroxytryptophan) helps your brain produce serotonin, a neurotransmitter involved in sending messages through the nervous system that contribute to your mood and well-being.These capsules are a great way...

Purest Form, Clinically Tested Boosts Cellular Energy Transports Fatty Acids L-Carnitine is a non-essential amino acid that helps to maintain overall good health by facilitating the transfer of fatty acid...

Pharmaceutical Grade, Free-Form. Promotes Restful Sleep. Nervous System Support. Glycine is the smallest and simplest amino acid, making it versatile for use in a wide range of functions. Glycine is...

Helps to temporarily promote relaxation Stressful days call for L‑theanine! From pre-test jitters to presentation prep nerves, this amino acid helps to temporarily promote relaxation so you can perform your...

Pure Powder Nitrogen Transporter Immune Support Glutamine is considered to be a conditionally essential amino acid, which means that under certain circumstances, the body may require more glutamine than it...

Product color: Clear to light pink 3,000 MG Highly Absorbable Fat Metabolism Citrus Flavor 32 Servings NOW® L-Carnitine Liquid has all of the properties of carnitine in a highly absorbable...

Conditionally Essential Amino Acid Nitric Oxide Precursor Arginine is a conditionally essential basic amino acid involved primarily in urea metabolism and excretion, as well as in DNA synthesis and protein...

Essential Amino Acids Leucine, Isoleucine, Valine Pure Aminos The branched-chain amino acids (BCAAs), leucine, isoleucine and valine are essential amino acids, and thus cannot be made in the body. BCAAs...

Healthy Visual Function Healthy Nervous System Non-GMO Taurine is a conditionally essential amino acid that is not utilized for protein synthesis, but is mainly found free in most tissues, especially...

Hepatec is a stable combination of two important endogenous amino acids, L-Ornithine and L-Aspartate. After administration it quickly breaks down into L-Ornithine and L-Aspartate. This medication is used as an...

Protein Metabolism Nitric Oxide Precursor Muscle Maintenance Arginine is a conditionally essential basic amino acid involved primarily in urea metabolism and excretion, as well as in DNA synthesis and protein...

Structural Support Collagen Production L-Proline is an amino acid that is necessary for collagen production. Collagen is the main structural protein that constitutes all human connective tissues, including skin, tendons,...

Healthy Skin, Hair and Nails With Vitamins B-6 and C Cysteine is a non-essential sulfur amino acid, which plays a critical role in methionine, taurine and glutathione metabolism. It is...

Encourages Positive Mood Promotes Restful Sleep L-Tryptophan is an essential amino acid; therefore, it is not synthesized by the body and must be obtained from the diet. L-Tryptophan is critical...

Amino Acids, Ginkgo and DMAE Plus CoQ10 and Grape Seed Extract Norepinephrine and dopamine are key neurotransmitters for the maintenance of alertness and mental acuity and for promoting a feeling...

Aminoleban Oral is a specialized enteral formula containing amino acids. carbohydrates, fats, vitamins and minerals to supplement the dietary intake in patients with chronic liver impairment. The preparation has an...

Critical for Normal Brain Function Immune System Support Essential Amino Acid L-Histidine is an essential amino acid that is best known for its role in the production of histamine, an...

Reduces cognitive fatigue Free-form amino acid for optimal absorption and effectiveness Non-GMO, vegan-friendly, and third-party certified for purity Natural Factors L-Tyrosine is a free-form amino acid that helps reduce cognitive...

Muscular Endurance Delays Muscle Fatigue Beta-alanine is a non-essential amino acid that is used by muscle cells to synthesize carnosine. Carnosine is a dipeptide (beta-alanine plus histidine) that functions as...

NOW® L-Lysine is a pharmaceutical grade essential amino acid. Supports Healthy Connective Tissue Supports Calcium Absorption Supports Collagen Synthesis Healthy Immune Function Healthy Skin and Lips Helps to reduce the...