Hypoallergenic. Casein & Gluten Free. L-Carnosine (also known as carnosine) is a molecule consisting of the amino acids alanine and histidine. It is found in significant concentrations in skeletal muscle tissue heart muscle nerve tissue and in the brain. . Kirkman® offers the highest quality chemically pure L-Carnosine available. The capsules are hypoallergenic specially formulated for individuals with special requirements or sensitivities. They are made from plant cellulose (pine) instead of the traditional animal gelatin shell.