xcessive consumption of mass gainer supplements can often lead to weight gainer side effects such as cramps and bloating. One of the primary reasons as to why this happens is because your body is not accustomed to consuming so many calories, mostly sugar in a single go.
This can interfere with the absorption of nutrients, especially in the small intestine. These particular weight gainer side effects are more exaggerated in the case of people who have been diagnosed with lactose intolerance since most mass gainers have been formulated using milk sources.