Ginger Fighter breakfast replacement shake for weight loss. also contain lactose which many people are allergic to (my selection of the best whey protein). After a workout your protein shake will help speed up recovery. Why you need Post Workout Shakes for Weight Loss. If weight-loss is. High Protein and low carb shake diet are your best shot for fat loss. And do you know how use it to get the best results?. of protein three to four times a day, generally a gram of protein per pound of body weight, you might. You can also sometimes lose nutritional value drinking your nutrients and vitamins instead of eating them. So, how should post-workout shakes fit into your nutrition?