Among the hardest processes in body building is to gain weight. Several factors have been considered including body mass index, rate of metabolism and family background and these all affect weight gain. Even eating alone is not really considered a best mass gainer. To assure eating will probably be effective, many people compliment this with supplement intake. There are many companies who state that the supplement they market is the most effective mass gainer nevertheless they don't succeed many times. If you really want to gain weight, make use of the natural way of doing it.