Protein is personal. Here's how to calculate your optimal intake

Apr 6, 2026 · 12 min

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0:00You're listening to LifeKit from NPR.

0:05Hey, it's Marielle.

0:07Today on the show, we're talking about protein.

0:10You may know that we need it to stay alive and that it allows us to build and repair our muscle tissue, but it does a lot more.

0:18It also makes the enzymes your body uses to digest food.

0:23It produces the antibodies that help your immune system fight off viruses and infection.

0:28So proteins are really kind of workhorse molecules.

0:31They're absolutely essential.

0:33This is Allison Aubrey, a science and health correspondent at NPR.

0:37She's been reporting on protein lately because protein, it seems, is having a moment.

0:43In particular, because health secretary Robert F.

0:45Kennedy Jr.

0:46is a big proponent.

0:47In fact, he says he personally only eats meat, fish, and fermented foods like yogurt.

0:53Though I should say the federal government issued new dietary guidelines for Americans this year, and they do recommend eating plenty of fruits, vegetables, and whole grains.

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