Lactoferrins are found in bodily secretions such as saliva, tears, milk and within nasal passages.

Previously used in a variety of conditions, Laetrile is now illegal for this use in the United States.

L-Carnitine is one of eleven amino acids produced by the body.

Lemon balm may support stress levels, promote a calming sense, support healthy sleep and the digestive system.

Leucine is an essential amino acid that is obtained from dietary sources.

L-Glutamic Acid acts as an excitatory neurotransmitter and a precursor for GABA.

L-Glutamine supports irritated tissues in the digestive tract.

Licorice stimulates the immune system, and supports respiratory and women's health.

Linden may support the immune system, healthy sleep and help maintain blood pressure within normal limits.