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Science-backed fitness 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FeaturedThe number on the back of your protein bar isn't wrong; it's just outdated.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.
FeaturedFor decades now, carbohydrates have been the target for people gaining unwanted fat mass, but reality is much different than what most believe. In this article, the carbohydrate-insulin hypothesis is explained, along with the energy balance theory, and the views on both carbohydrates and body fat from experts such as David Ludwig and Kevin Hall.
FeaturedJuice cleanses. Tea detoxes. "Toxin-flushing" teas. Here's what nutrition science actually says about whether your body needs a detox diet, myth by myth.
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.