Winfinith Slim Shake is a delicious mango-flavored low-calorie meal that provides complete nutrition without overloading you with unnecessary fats and calories. Each serving(25 grams) of Winfinith Shake provides you 19 vitamins and minerals, 19.2 g of protein and 3g of fiber. Its made up with soya protein isolate, Whey Protein concentrate, Zingiber officinale root Powder and more. Soya Protein Isolate: Soya protein isolate contains very little fat and no cholesterol and soy-based high-protein diets are effective for weight loss. Whey Protein Concentrate.