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For years, "yo-yo dieting" has been blamed for wrecking metabolism and causing lasting damage, but a major new review says the fear may be wildly overblown. After analyzing decades of studies in humans and animals, researchers found little convincing ...

Scientists have uncovered a surprising new trick used by one of cancer's most notorious proteins. MYC, already infamous for fueling runaway tumor growth, also appears to help cancer cells survive by repairing their damaged DNA -- including damage ...

Exercise may be training your brain just as much as your body. Researchers discovered that certain brain cells stay highly active even after a workout ends, and those lingering signals appear to help the body build endurance over time. In experiments ...

Researchers have shown for the first time that malfunctioning mitochondria -- the cell's energy generators -- may directly cause cognitive decline in neurodegenerative diseases. By creating a new tool that temporarily boosts mitochondrial activity in ...

A major analysis of brain scans found that people with anxiety disorders have noticeably lower levels of choline, a nutrient crucial for healthy brain function. The strongest evidence appeared in the prefrontal cortex, the region tied to emotional .. ...

A new study suggests microscopic particles from the gut may actively drive inflammation and chronic diseases associated with aging. Remarkably, gut particles from young animals appeared to counter some aging-related damage in older animals, hinting . ...

Scientists are uncovering a surprising link between hidden tooth infections and blood sugar problems. Deep infections around tooth roots can create chronic inflammation that spreads through the body and may interfere with insulin function. Studies .. ...

You may not need hours at the gym to boost your health after all. Researchers say just 30 minutes of high-intensity exercise per week -- broken into tiny bursts of effort that leave you out of breath -- can dramatically improve cardiovascular fitness ...

Cannabis use among older adults is rising fast, but today's marijuana is far more potent than many people realize -- and experts warn the risks may be underestimated. Stanford Medicine specialists say modern cannabis can increase the chances of heart ...

Scientists have uncovered a surprising dark side to vitamin B2: it may help cancer cells stay alive. The vitamin supports a cellular shield that protects tumors from ferroptosis, a form of programmed cell death linked to cancer suppression. In lab .. ...