Precursor to L-Arginine, a non-essential amino acid that is involved in protein synthesis
Healthy Protein Balance
Vegetarian / Vegan
Citrulline is a non-essential amino acid that is an important intermediate in the urea cycle, functioning along with other amino acids to rid the body of ammonia, a by-product of protein metabolism.

Precursor to L-Arginine, a non-essential amino acid that is involved in protein synthesis
100% Pure Powder
Vegetarian / Vegan
Citrulline is a non-essential amino acid that is an important intermediate in the urea cycle, functioning along with Arginine and Ornithine to rid the body of ammonia, a byproduct of protein metabolism. Because Citrulline is a precursor of Arginine, it provides a readily available source material for Arginine production, thereby helping the body maintain healthy Arginine levels. Powder form allows for controlled dosing and can be added to health shakes.

Precursor for glutathione, the primary cellular antioxidant, to maintain good health
With Vitamins B-6 and C
L-Cysteine is a sulfur-containing amino acid that plays a large role in making the structure of collagen. I also helps generate glutathione, the master antioxidant that helps support detoxification and immune system function. L-Cysteine will help make proteins such as Metallothionein, which have the role of binding to heavy metals such as mercury, lead and cadmium. NOW® L-Cysteine has added Vitamin C to help with collagen formation, and Vitamin B6 to aid glutathione production.

Helps support immune system health after periods of physical stress and helps to assist in muscle cell repair after exercise
Double Strength
Free Form
The highest grade L-form amino acid available
Glutamine has recently been the focus of much scientific interest. A growing body of evidence suggests that during certain stressful times, the body may require more Glutamine than it can produce. Under these circumstances Glutamine may be considered a “conditionally essential” amino acid. Glutamine is involved in maintaining a positive nitrogen balance (an anabolic state) and also aids rapidly growing cells (immune system lymphocytes and intestinal cell enterocytes). In addition, Glutamine is a regulator of acid-base balance and a nitrogen transporter. This double-strength 1000mg dosage is ideal for those that are in heavier training cycles, or individuals nder higher degrees of stress.

Helps to assist in muscle repair after exercise
Free Form
Vegetarian / Vegan
Glutamine has recently been the focus of much scientific interest. A growing body of evidence suggests that during certain stressful times, the body may require more Glutamine than it can produce. Under these circumstances Glutamine may be considered a “conditionally essential” amino acid. Glutamine is involved in maintaining a positive nitrogen balance (an anabolic state) and also aids rapidly growing cells (immune system lymphocytes and intestinal cell enterocytes). In addition, Glutamine is a regulator of acid-base balance and a nitrogen transporter.

NOW® L-Glutamine Powder is a pure, free-form, nonessential amino acid and is the highest grade available. It allows for controlled dosing and can be added to beverages and health shakes.

Helps to reduce the recurrence of herpes simplex virus (HSV) infection (e.g. cold sores)
Helps in collagen formation
An essential amino acid for the maintenance of good health
Double Strength 1000mg
Vegetarian / Vegan
L-Lysine is an essential amino acid that must be obtained through the diet or through supplementation. Lysine is necessary for the production of all proteins in the body, and is required for the maintenance of the structural proteins collagen and elastin, which form all connective tissue such as skin, tendon, and bone. L-Lysine is also a precursor to L-carnitine, which is needed for fat metabolism and energy production, which can support good health. In addition, L-Lysine supports a healthy immune system helping to fight cold sores. This double strength 1000mg tablet is ideal for tougher and recurring cold sore sufferers, and those dealing with more serious concerns of bone health and family history of osteoporosis.

Helps to reduce the recurrence of herpes simplex virus (HSV) infection (e.g. cold sores)
Helps in collagen formation
An essential amino acid for the maintenance of good health
Capsule delivery for improved absorption
L-Lysine is an essential amino acid that must be obtained through the diet or through supplementation. Lysine is necessary for the production of all proteins in the body, and is required for the maintenance of the structural proteins collagen and elastin, which form all connective tissue such as skin, tendon, and bone. L-Lysine is also a precursor to L-carnitine, which is needed for fat metabolism and energy production, which can support good health. In addition, L-Lysine supports a healthy immune system helping to fight cold sores. Capsule delivery provides faster, more complete absorption.

Helps to reduce the recurrence of herpes simplex virus (HSV) infection (e.g. cold sores)
Helps in collagen formation
An essential amino acid for the maintenance of good health
Vegetarian / Vegan tablet delivery format
L-Lysine is an essential amino acid that must be obtained through the diet or through supplementation. Lysine is necessary for the production of all proteins in the body, and is required for the maintenance of the structural proteins collagen and elastin, which form all connective tissue such as skin, tendon, and bone. L-Lysine is also a precursor to L-carnitine, which is needed for fat metabolism and energy production, which can support good health. In addition, L-Lysine supports a healthy immune system helping to fight cold sores. Tablet delivery avoids a gelatin capsule and provides a vegetarian / vegan option.

An essential amino acid for proper cellular function and protein synthesis
With Vitamin B-6 to help metabolize proteins, fats and carbohydrates
Essential Amino Acid
L-Methionine is classified as an essential amino acid, which means that it cannot be manufactured by the body. It must be obtained through the diet or by supplementation. L-Methionine, a sulphur-based amino acid, supports the production of the cellular antioxidant, glutathione, thereby assists in natural detoxification processes. In the body, L-Methionine can also be converted into SAMe (S-Adenosyl Methionine), a compound that supports healthy joints.

Supports and maintains protein metabolism
Vegetarian / Vegan
Ornithine is a non-essential amino acid that plays a central role in the urea cycle, functioning along with Arginine and Citrulline to rid the body of ammonia, a byproduct of protein metabolism. Because Ornithine is converted into Arginine, it can help to maintain healthy Arginine levels in the body. Ornithine can also be converted into other amino acids, such as citrulline, proline, and glutamate, as well as creatine, an important muscular energy source.

Supports and maintains protein metabolism
Vegetarian / Vegan
Ornithine is a non-essential amino acid that plays a central role in the urea cycle, functioning along with Arginine and Citrulline to rid the body of ammonia, a byproduct of protein metabolism. Because Ornithine is converted into Arginine, it can help to maintain healthy Arginine levels in the body. Ornithine can also be converted into other amino acids, such as citrulline, proline, and glutamate, as well as creatine, an important muscular energy source.