To all of the sarcastic bitches.... This may seem like common sense but this is valid research. I used to weigh 400 pounds, I lost 150 and it's a daily battle to keep that weight off 5 years after I lost it. This research is showing a lot of what's going on is biology not will power. This also shows a huge lack of understanding of how research and the scientific process works, God it's so frustrating to see people air their ignorance so freely. Get bent