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Can You Reverse Prediabetes? The 25 Percent Finding That Changes the Advice
Can you reverse prediabetes? Short answer: Yes, prediabetes can often be pushed back into the normal range, and the strongest long term evidence favours structured lifestyle change over metformin for wider health protection. In a 20 year follow up of adults with prediabetes, an intensive lifestyle programme built around losing at least 7 percent of…
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Do Ultra-Processed Foods Cause Weight Gain in Children? What a Dutch Study Found Years Later
The short answer In one Dutch birth cohort, children who ate the most ultra-processed food at age three had a larger rise in BMI z-score by age ten to eleven than children who ate the least. The difference between the highest and lowest quarters was 0.22 BMI z-score units, with a 95 per cent confidence…
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How Much Deep Sleep Do You Need? What 95,000 Sleep Trackers Say About REM and Your Health
The short answer Most healthy adults spend about 13 to 25 per cent of the night in deep sleep and 20 to 25 per cent in REM sleep. On an eight-hour night, that works out at roughly 60 to 110 minutes of deep sleep and 90 to 120 minutes of REM. There is no official…
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What Are the Symptoms of High Blood Pressure? What 1.4 Million Health Records Revealed
High blood pressure usually has no symptoms. A study of 1.4 million adults found 59% of those with hypertension were undiagnosed. Learn the rare warning signs and when to get checked.
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What a ‘Validated’ Cancer Blood Test Actually Proves: Decoding the Guardant Reveal COSMOS Study
You have probably seen the headline: Guardant Health says its Guardant Reveal blood test has been “validated” for predicting cancer recurrence. The announcement is a company press release, and the word “validated” is doing a lot of heavy lifting. Here is what the study behind it actually shows. The short version: the Guardant Reveal COSMOS…
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Do Your Speech Patterns Reveal How Fast Your Brain Is Aging? What a Large New Study Found
The direct answer: a large new study on speech patterns brain aging suggests that how you speak can reveal how your brain is aging. The study, the largest yet to test the link between speech patterns and brain aging, enrolled 2,928 adults across five countries. Researchers built a “speech clock” from hundreds of voice and…
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Coffee and Bone Health: What the Research Actually Says
Short answer: Moderate coffee drinking, roughly two to three cups a day, shows no meaningful link to weaker bones or fractures in the largest pooled studies. Risk only starts to appear at very heavy intake, around five or more cups daily, and mostly in people who also get too little calcium. For coffee and bone…
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Can Diet Slow Brain Aging by 2.5 Years? What the Numbers Actually Show
The headline is seductive: a diet can slow brain aging by 2.5 years. Behind it sits a real 2026 study that followed 1,647 adults with repeated brain MRI scans across more than a decade. Diet slow brain aging research rarely gets data this long-running. The 2.5-year number, though, is a statistical translation, not a clock…
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When Subscales Stop Being Subscales: A 0.949 Correlation and the DASS-21
DASS-21 validity matters every time a researcher treats the scale’s three subscales as separate outcomes. The DASS-21 is one of the most widely used mental health questionnaires in student research, with separate subscales for depression, anxiety, and stress. In our psychometric study of 602 Pakistani university students, the confirmatory factor analysis fit the data well,…