...compounds in mango may be beneficial in offering protection against breast cancer and colon cancer. [Read more about Healthy ways to gain weight ] If You Want to Gain Weight, Eat Mangoes! For those of you who are trying to gain a few more pounds, one of the easiest and most effective ways would be to eat mangoes on a regular basis. As mentioned earlier in the nutrition section, a cup of mango provides about 100 calories, which is easily absorbed b...