52 Weight Gaining Shake Recipes to Get Bigger Faster: Naturally Increase in Size In 4 Weeks or Less By Joe Correa CSN Fighting to gain weight can be difficult for many people who have a fast metabolism. The key is to gain weight in a healthy manner so you can manage your weight. Being too heavy or too thin are unhealthy extremes. Although you want to eat foods with additional calories, gaining extra pounds is not that simple. First of all, you need...