However, he pointed out that a whopping 40% of Milo is made up of pure sugar! That's not even the scariest part, as he goes on to say in the video. He also stated that sugar isn't the only harmful ingredient in Milo, mentioning Maltodextrin as another food additive to avoid. Maltodextrin may cause allergic reactions, weight gain, gas, flatulence, and bloating. Maltodextrin may also cause a rash or skin irritation, asthma, cramping, or difficulty breathing.