Juniper: see encyclopedia entry

Kava Kava: see encyclopedia entry

KCl (potassium chloride): A colorless crystalline solid or powder used widely in the preparation of most potassium compounds (also called potassium muriate).

Keratin: An insoluble protein found in hair, skin, and nails.

Keshan's disease: A severe cardiac disorder associated with selenium deficiency.

Korean Ginseng: see encyclopedia entry

Laxative: A substance that stimulates bowel movements.

L-Carnitine: see encyclopedia entry

Lecithin: see encyclopedia entry

Leukocyte: White blood cell.

Licorice: see encyclopedia entry

Linoleic acid: An omega-3 fatty acid found primarily in cold-water fish and flaxseed oil.

Linolenic acid: An omega-6 fatty acid found in many seeds.

Lipids: Fats or fatty substances including cholesterols, triglycerides, and phospholipids.

Lipoprotein: A complex of lipid and protein responsible for the transport of fats within the bloodstream.

Lipotropic: Describing a substance that prevents or inhibits the accumulation of fat in the liver.

L-Lysine: see encyclopedia entry

Low density lipoprotein (LDL): Often called the "bad cholesterol," a compound comprised of fat and protein that carries fats in the blood. High levels of LDL are associated with an increased risk of cardiovascular disease.

Lupus: A chronic autoimmune disease where the immune system attacks the body's own tissues, resulting in fatigue, fever, muscle and joint pain, skin rash, swollen lymph nodes, and poor circulation.

Lutein: An antioxidant that helps protect the eyes from free-radical damage. Found primarily in dark green, leafy vegetables. see encyclopedia entry

Lycopene: A powerful antioxidant carotenoid found in tomatoes. It is especially active in the prostate gland. see encyclopedia entry

Lymph nodes: Glands located in the lymph vessels that trap foreign material and protect the bloodstream from infection.

Lymphocytes: A type of white blood cell found primarily in lymph nodes. They are crucial components of the immune system.

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