Mama June Shannon has a few weight loss secrets up her size 4 sleeve! “It’s all about portion control for me,” Shannon, 38, tells PEOPLE exclusively in this week’s issue, on stands Friday. The reality star dropped 300 lbs. earlier this year from her onetime high of 460 lbs. “It’s not easy to eat like you’re ‘supposed to’ and hit the gym all the time, but I’m just trying to maintain it the best I can,” she adds.