MEDICAL TREATMENTS IN NATURE Many modern drug miracles are in their basics derived from molecules from nature. When hunting in nature, it is vitally important to properly identify the plant you are harvesting before you use it. Be certain to obtain and use clear and accurate plant identification books for your region. Better yet, take classes or go with an experienced guide. Potential seed sources, if not available to you locally, are: Eight ounces of the juice or whole leaf extract may prevent or reduce the size of kidney stones. BARLEY - Soluble beta-glucan fiber remains even in refined flour.