The Effect of Low Temperature and Dietary Calcium upon Magnesium Requirement

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Abstract
Growth studies with weanling albino rats show that the magnesium required per gram of diet to promote equal gains in weight appears to be about 4 times higher at an environmental temperature of 55°F. than at 78°F. Since the maximum rate of gain is less at the lower temperature, the difference in the amount required for maximum gain is about twofold, 25 mg per 100 gm at 78°F. compared to 50 mg per 100 gm at 55°F. High calcium diets were detrimental at low magnesium intakes. In some experiments high calcium diets apparently accentuate cold injury.