Can the right diet really cure all our health problems?

MAHA’s new food directives want you to know “food is medicine.” | Kinga Krzeminska/Getty Images

If there is one universal treatment that Robert F. Kennedy Jr.’s Make America Healthy Again sees for all of the country’s medical problems, it’s food.  

Borrowing a phrase that has become ubiquitous in health policy circles and the influencer ecosystem that drives so much of our discourse these days around health and wellness, Kennedy has declared: “Food is medicine.”

And this month’s...