Kohler G, Elvehjem C, Hart E. Science. 1936. 445
Growth of rats increases on a diet of milk produced on summer pasture compared with milk produced from winter feeding conditions. i.e. fodder. When grass juice was added to the winter milk diet, growth doubled from 2 to 4 grams a day. (See Fig. 1) It was evident there are important water-soluble substances in the juice that directly stimulate growth when added to winter milk.
Dr. Chris Reynolds’ comment:
This is one of the earliest studies by Kohler demonstrating the presence of the “Grass Juice Factor” in cereal grasses and the profound effect it can have on animal growth. I believe this is brought about by the direct effect of wheatgrass bioactives crossing the blood-brain barrier to influence the brain directly.