Normal levels of vitamin A in tissues of the Syrian hamster (Mesocricetus auratus) determined colorimetrically.

Vitamin A levels in tissues of 20 normal adult hamsters on a standard diet were measured colorimetrically. No significant difference between male and female animals was found for any of the tissues sampled. The mean vitamin A value for blood plasma in 20 animals was 53.4 micrograms/dl. Mean values for liver, kidneys, flank skin and cheek pouch were 813, 1.29, 1.84 and 1.31 mg/g wet weight, respectively. The vitamin assay was less suitable for small organs such as trachea.