fat burner

I had a friend who really wants to lose weight. She’s already in her late 30s and have not had children yet but she’s getting heavier every year. I wonder why she’s getting heavy when she doesn’t eat too much. She only eats during meal times and sometimes doesn’t even have snacks during the day. She’s not really a heavy eater. I told her to take fat burner because maybe her metabolism is slow already. I hope that could help her.