…dramatic synergy with vitamins A and D. Chickens voluntarily consumed more butter and died more slowly on a deficiency diet when the butter was high in both vitamin A and…View more »On the Trail of the Elusive X-Factor: A Sixty-Two-Year-Old Mystery Finally Solved
…dramatic synergy with vitamins A and D. Chickens voluntarily consumed more butter and died more slowly on a deficiency diet when the butter was high in both vitamin A and…View more »