The vitamin B12 content of meals and items of diet

Abstract

1. The vitamin B12 content of items of diet and of meals was measured after they had been prepared for consumption.2. There was poor agreement between the vitamin B12 contents of meals estimated by measurements on meal homogenates and the contents estimated by calculations involving the weights and vitamin B12 contents of items.3. The average amount of vitamin B12 absorbed per d from a hospital diet was found to be 1.7 μg.