“…Popper and Volk (1944) in a fluorescent microscopy study observed that tocopherol did not influence the absorption of vitamin A when 15 mg. c^-tocopherol was given with 25,000 lU vitamin A to rats. Rao (1945) observed that young rats de pleted of their vitamin A reserves responded to 1 meg, -carotene dis solved in either 100 mg. groundnut, olive or coconut oil at a growth rate which was dependent upon the vitamin E content of the respective oil.…”