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Science-backed protein articles and practical guides from NutriFactx.
FeaturedThe number on the back of your protein bar isn't wrong; it's just outdated. Here's how much protein you actually need, according to the newly updated 2026 federal guidelines, and why most of us have been underestimating it for years.
FeaturedThe standard protein RDA wasn't built for women over 50. Here's the science-backed number researchers recommend and how to hit it.
Featured0.8 grams per kilogram; is that really enough? Leading protein researchers say the official recommendation misses the mark for most active adults.