Everything has protein in it now. The thing being sold is the word.

Protein ice cream. Protein soda. Protein water. Protein pancakes, chips, popcorn, candy. Semafor reports today that sales of products marketed as protein-rich rose 4.8% year over year through March, and that the food industry is reformulating whole aisles around a single nutrient. A nutritionist quoted by the Wall Street Journal has a name for much of it: protein-enriched junk food. We would add only that the boom is a case study in how the longevity economy works, and that it has almost nothing to do with whether you need more protein.

What the evidence says about the nutrient. Protein matters, and it matters more as you age. The US recommended allowance is 0.8 grams per kilogram of body weight a day, and a reasonable body of evidence suggests older adults, who lose muscle more easily and use protein less efficiently, do better with somewhat more — especially alongside resistance training, which is the part the aisle leaves out. But the typical American already eats more protein than the allowance. The population that benefits from a protein push is older adults who eat too little, often because they live alone or on a budget; the population buying protein soda is neither. The nutrient has a real case. The ice cream does not.

Ben’s take

A single word on a label is the cheapest product upgrade in the business: no new food, no trial, a bigger price and a health halo. Fat had its decade, then carbs, then sugar; protein is the current word because it is the one with no villain attached. Watch the halo do its work — a candy bar that says protein is a candy bar that no longer triggers guilt, and guilt was the only thing standing between the customer and a second one.

Loree’s take

The patients who most need more protein are my oldest ones, and they are not buying protein popcorn. They are eating toast for dinner because cooking for one is hard. Eggs, beans, fish, yogurt, chicken, lentils, a glass of milk: that is the protein prescription, and it costs less than the engineered version. If you lift something heavy twice a week, the protein has somewhere to go. If you don't, the number on the label is a number on a label.

Why it matters to a recovering optimizer. The protein boom works because it attaches a true thing — older adults should mind their protein — to a product category that does nothing for them. That is the longevity trap in a snack wrapper: the fact is real, the fear is manufactured, and the solution is for sale. Real food already has the protein in it. It just doesn't say so on the front.