Effect of vitamin A deficiency on the content of three forms of vitamin A in hen's eggs

In the ripe eggs of all species of marine teleost fish so far examined, retinal (vitamin A aldehyde) is the predominant form of vitamin A, and in some species it represents 90% of the total vitamin A-active material in the eggs (Plack, Kon & Thompson, 1959; Plack & Kon, 1961).Hen's eggs also contain retinal and, for forty-one eggs from six hens on a diet of breeder's mash, a value of 21.7 pg/egg was obtained, representing % of the total vitamin A (Plack, 1963). The predominance of retinal in fish eggsGrant-aided by the Development Fund.