Conventional wisdom about diets, including government health recommendations, seems to change all the time. And yet ads routinely come out claiming to have THE answer about what we should eat. So how do we distinguish what’s actually healthy from what advertisers just want us to believe is good for us? Mia Nacamulli gives the facts on fad diets in this TED Ed video.

In the US, 80% of girls have been on a diet by the time they're 10 years old. In this honest, raw talk, neuroscientist Sandra Aamodt uses her personal story to frame an important lesson about how our brains manage our bodies, as she explores the science behind why dieting not only doesn't work, but is likely to do more harm than good.

What if nonfat foods are actually making us less likely to lose weight? Neuroscientist Krzysztof Czaja's research focuses on obesity and finding non-surgical ways to overcome it.