Lysine is an indispensable amino acid that cannot be made by the body. Amino acids form the basis for protein, which helps construct and maintain the critical structures in the body.** Lysine is also used for the health and integrity of skin and lips, as it is used in the production of collagen and tissue maintenance.** Zinc also plays a role in immune system health, affecting more than 300 enzymes in the body.** It is essential for cell division, which is pivotal when immune cells are rapidly multiplying to meet the requirements of the immune system. Antioxidants like zinc help to protect your cells from free radicals.**