Rawmest Karela ( Bitter Gourd ) Powder An excellent source of dietary fiber, it also contains twice the calcium of spinach, beta-carotene of broccoli, and the potassium of a banana. Rawmest Karela Powder helps in preventing from the diabetes mellitus as it contains a hypoglycemic compound means plant which lowers down the blood and urine sugar level. It provides help in protecting from the diabetic complications by reducing the harmful effects of free radicals.