Abstract
Leukocytes and leukocyte membranes isolated from the blood of carotenemic (serum carotene, 4.0 mg/liter) and non-carotenemic individuals were found to contain small amounts of carotenoid pigments. The principal pigment isolated from the leukocyte membranes of carotenemic individuals was beta-carotene. Traces of beta-carotene and other carotenoids were found in the leukocytes and leukocyte membranes of the non-carotenemic individuals.