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Chemical Dosage References ASCORBIC-ACID 1-2 g/day Davies, S., and Stewart, A. 1990. Nutritional Medicine. Avon Books, New York. 509pp.*Unless otherwise noted all references are to Duke, James A. 1992. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton, FL. CRC Press.