Am I Destined To Be This Size?

You know better than to expect life to be fair. But still, it's enough to drive anyone crazy: Some people seem to be able to eat anything they want and never gain weight. Others of us — well, as Juna says, you ask yourself: Is it all just genetic? Am I just "big-boned"?

She and Eddie dig into weight destiny in episode six, beginning with the basics of nature versus nurture: About 50% of weight variation stems from genetics, according to Rooth Loos, a professor of public health at the Icahn School of Medicine. The other 50% depends on environment (including exercise and outside cues that encourage unhealthy eating.) Here's a sentence that nicely sums it all up: Genes load the gun, and environment pulls the trigger.

Follow "Food, We Need To Talk" on Instagram here.