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Jarrow Formulas

  • Supports growth and development.
  • Helps with tissue repair and maintenance.
  • Needed for protein metabolism.

L-lysine is an essential amino acid that the body requires, but fails to produce itself. Studies have found that lysine is an important link in the body’s ability to utilize calcium. Lysine disrupts the replication of herpes and is prescribed by doctors to individuals who suffer from cold sores or have contracted genital herpes. Although not completely conclusive, trials investigating the benefits of lysine on cold sores support the use of lysine for this purpose.

Since lysine supplementation increases the absorption of calcium and may reduce its excretion, some researchers are confident that lysine may some day play a role in the prevention and treatment of osteoporosis.

Jarrow Formulas® L-Lysine 500 is the hydrochloride (HCl) form of L-Lysine, which is twice as stable as the monochloride form. 625 mg of L-Lysine HCl yields 500 mg of elemental L-Lysine.

Supplemental Facts
Serving Size: 1 Capsule(s)

IngredientsPer Serving% DV
L-Lysine (from 625 mg L-Lysine HCI) 500 mg *
* Daily Value Not Established

Caution: Keep out of the reach of children.


  • L-Lysine (500 mg)
    Amino Acids