ManFeed PRO is the ultimate mass gainer. It was created with the help of Doctor William Hennen, and leveraged his expertise in nutrition and gut health so that we could build a product that would supercharge the male athlete. ManFeed sources all of its calories and protein from varied and natural food sources. As a result, it is a very digestible healthy source of protein and calories that will enhance your recovery after your workout; and because our goal was to create something that would increase the available energy for our athletes, we included patented Transfer Factor technology with probiotics. Transfer Factor's role is to work with the included probiotics to rid your gut of any harmful bacteria, thus freeing your immune system from dealing with these intruders and increasing the efficiency of the immune system. The energy that would have been spent by the immune system to clean your gut of this bacteria is now made available to the body for athletic performance. This is compounded by the added chia seeds that provide antioxidants, Omega 3, carbohydrates, protein, fiber, and calcium. Altogether it is a powerhouse of a supplement that has catapulted many collegiate and professional athletes to very high levels of achievement. It will do the same for you, as long as you work as hard as ManFeed does.