Histidine is a non-essential amino acid for adults, and dietary sources probably cover most of the bodys histidine needs. It is used for protein synthesis, the formation of red and white blood cells, and participates in the metabolism of important trace elements such as copper, manganese, iron, and zinc. Each capsule provides 500mg of free-form histidine for maximum absorption and bioavailability. Nutritional information L-Histidine HCl / 500mg Ingredients used in the capsule: L-histidine hydrochloride, Capsule shell (gelatin), Anti-caking agent (magnesium stearate), Silicon dioxide.How to use Absorption time: Less than 30 minutes. Dosage: 1 to 6 capsules per day, with juice or water rather than milk. Amino acids are better absorbed when taken half an hour before meals or before bedtime. Storage: Store in a cool, dry place away from light. Keep out of reach of children.Precautions and side effects Allergies: None. Precautions: The product is not recommended for children and pregnant or breastfeeding women. Food supplements should not be used as a substitute for a balanced diet. The product is not intended to prevent, treat or cure human disease. Consult your doctor if you are pregnant, nursing, taking medication or have a health condition.Form and packaging White powder in hard capsule. Packaging: 30 capsules.