Comparative Nutritive Value of Casein and Lactalbumin for Man

Casein and lactalbumin have been fed at an intake level of 2% of the calories to 4 well adults following a 12-day protein depletion. Two 4-day periods of supplementation with each protein were alternated with 4-day depletion periods. Nitrogen balances and calculated biological values indicated that casein and lactalbumin are equally effective in maintaining nitrogen balance in adult man.