The “Grass Juice Factor”
The relation of the ‘grass juice factor’ to guinea pig nutrition. Kohler, G., Elvehjem, C., Hart, E. 1938. J. Nutr. 1938 Vol15. 5:445-459 Guinea pigs were fed on winter milk or milk plus supplement. The winter milk was deficient in one or more essential factors necessary for normal development, and the animals faded…