The conversion of carotene to vitamin A2 by some fresh-water fishes

Abstract
Perch and dace in captivity thrive on a diet of blow fly larvae. When this diet is enriched with carotene for a few weeks the store of vits. A and A2 increases considerably. Carotene thus acts as a provitamin for both. The constitution of vit. A2 cannot be very different from that of vit. A.

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