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The Vitamin B Complex of Coconut Water¹

Coconut water is taken by the people of Porto Rico both as a refreshment and as a diuretic. This latter use is probably based on tradition as no literature has been found which proves that coconut water is physiologically active in this respect. This paper is concerned with a study of two of the factors of the vitamin B complex content of the coconut water, viz., vitamins B (B₁) and G (B₂).

EXPERIMENTAL The experiments were conducted according to the methods of Sherman and Spohn (1) and Sherman and Axtmayer (2) for the quantitative determination of vitamin B complex values. These methods involve placing healthy young albino rats when twenty-eight to twenty-nine days old upon a vitamin B complex-free diet which is not only adequate but approximately optimal (for growth of rats) in all other respects. The basal diet consists of purified casein, 18; Osborne and Mendel's salt mixture, 4; butterfat, 8; cod liver oil, 2; and cornstarch, 68 per cent.

¹ From the School of Tropical Medicine of the University of Porto Rico under the auspices of Columbia University.