“According to Mackenzie, Mackenzie & McCollum (1941), however, the ability of a-tocopherol to prevent muscular dystrophy in rabbits was lost when it was administered within a short time of a dose of cod-liver oil , or when cod-liver oil was included in the diet.”
“Later Morris (1939) and Shimotori, Emerson & Evans (1939, 1940) showed, in rabbits and guinea-pigs respectively, that a-tocopherol could neutralize the tendency of cod-liver oil to cause muscular dystrophy.”