> For many sedentary adults, eating less could support healthier aging and possibly a longer life

Short unofficial video explaining the paper: https://youtu.be/aQ9VudCBqZQ

"...regular physical activity may offer protection by directing protein toward the development and maintenance of strong, healthy muscle."

TLDR: Broad protein intake should be increased much only if it's combined with resistance exercise, otherwise it's pro-aging. Especially methionine and BCAAs are pro-aging. Glycine, proline, and serine are anti-aging. That's not to say that methionine and BCAAs should be eliminated; they shouldn't; only their excesses should be eliminated.