Supports Protein Synthesis. L-Arginine is a semi-essential amino acid synthesized by the body from ornithine. Arginine supports protein synthesis as it is involved in the transport and storage of nitrogen. Arginine is important for proper physical performance because it is used by the body to produce creatine.*
Promotes healthy circulation!
L-arginine is an amino acid that plays an important part in the body's production of nitric oxide. Nitric oxide promotes vasodilation (relaxation of blood vessels), helping to maintain healthy blood flow throughout the body. Because of this effect, l-arginine is considered useful for concerns that improve with enhanced circulation, including men's sexual health.*

Arginine is considered a semi-essential Amino Acid as it does not fall perfectly in the essential or nonessential categories. According to Jon Pangborn in Yearbook of Nutritional Medicine, during growth periods (i.e. Body Building and wound healing) insufficient 

Arginine can be synthesized in the body at adequate levels for maintenance in adults

Arginine has been widely used by Olympic and professional athletes for safe buildup of muscle mass. Dr. Pangborn goes on further to state that 

Arginine is a critical component in stimulating the pancreas to release insulin. Therefore, Arginine may be indicated in some diabetics. 

Arginine has been shown to stimulate Thymus function and may therefore be indicated in Immuo depressed individuals. . It may not, however, be produced quickly enough during periods of growth, and is considered essential at those times.

Arginine stimulates certain glands, particularly the thymus and the pituitary. Because the pituitary secretes growth hormone, arginine is required for normal growth. And because of this participation in growth, it has become very popular for its muscle-building and fat-burning effects among athletes. 

Other functions of this amino acid are its ability to aid in liver detoxification, maintain immune function, boost sperm count, and assist in conditions involving kidney impairment. It also causes retardation of tumors and cancer. 

Arginine is thought to be beneficial in the treatment of cirrhosis of the liver and other liver problems. Its high content in scar tissue points to its involvement in tissue repair and collagen production. 

Arginine also contributes to increases in muscle mass and decreases in body fat. 

Pregnant and lactating women should avoid taking arginine because of its involvement in growth and shedding of fat.

Suggested Use: As a dietary supplement, take 2 capsules 1-3 times daily as needed, between meals or at bedtime with a carbohydrate drink to facilitate absorption.

Medicinal Ingredient Per Capsule:
L - Arginine (Synthetic) HCl ..................................................500 mg