Aaron Carroll : I thought I knew all about obesity ; a new study challenges that . He says obesity a big problem , but weight loss not as simple as fruits , veggies and no snacks . Studies do show that overall , vigorous exercise and watching calories help . Comment: Best tool against obesity is not to get there in first place .
Aaron Carroll : I thought I knew all about obesity ; a new study challenges that . He says obesity a big problem , but weight loss not as simple as fruits , veggies and no snacks . Studies do show that overall , vigorous exercise and watching calories help . Carroll : Best tool against obesity is not to get there in first place .