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.

About 50% of weight variation stems from genetics, according to Rooth Loos, a professor of public health at the Icahn School of Medicine. We'll also hear from Yale neuroscientist Dana Small.

Asked for just one recommendation for lifelong health, our experts all had the same answer: exercise. And there's one type of exercise that may bring the best benefit in the least amount of time.

Experts include: Wayne Westcott, Sal Di Stefano, and Jackie Shahar.

(Bonus: For more on exercise, listen to "The Magic Pill": https://www.wbur.org/magicpill)

Possibly the best thing you can do to help yourself eat better is not about choosing a particular type of food at all. It's about the quality of what you eat. The hosts distill the state of nutrition science down to a few helpful basics. Experts include: Dr. Walter Willett, Michael Pollan and Dr. Rani Polak.

Among the scary insights that brain science can offer into junk foods: eating them tends to shift food preferences long-term -- at least, in mice. Co-hosts Dr. Eddie Phillips and Juna Gjata discuss what happens in your brain when you eat the most craveable foods.

What if there’s no forbidden fruit? What if you think about eating to take care of yourself? In episode two, Juna describes the judgments she and others impose on themselves and their food choices.

Episode one! 24-year-old co-host Juna Gjata says restrictive eating has made her miserable her entire adult life, but she’s sure if she stops she’ll "literally gain 20 pounds on gingerbread lattes peppermint mochas."

Enter Dr. Eddie Phillips, founder of the Institute of Lifestyle Medicine and a seasoned doctor, who aims to help Juna get to a happier, healthier place with food.

One woman's quest to end her war with food. Hosts Juna Gjata and Dr. Eddie Phillips wield solid science, medical knowledge, common sense and an endless supply of dad jokes to teach us how to eat better and feel better about it. Hint: It’s not dieting. They discuss exercise, body image, food addiction, genetics, weight loss and more. A WBUR production.