The powders are much higher in nutrients and they are extremely convenient to take. So, if you want a whole foods vitamin, made in nature's laboratory, take the powdered grass. Powdered grass is nutritional. Fresh squeezed juice has the electricity of a living plant. It is a high vibration food.
Healing needs high vibrations in order to transmit the nutrients to the cells.
There is no specific science, however. Grasses, and that includes barley, oats, rye as well as wheat are blood purifiers. So, drinking plenty of grass juice will have a general benefit for bloodstream illnesses Grasses also carry high amounts oxygen. So if you can oxygenate and purify your blood, you will benefit in many ways. Build up to 2 ounces twice daily.