Your osteoporosis diagnosis is scored against two different populations at once
The hip T-score is computed against a US survey of white women aged 20–29 measured in 1988–94; the spine T-score against...
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The calcium formula everyone uses is not the one it cites
Corrected calcium is computed with a coefficient of 0.8 and attributed to Payne 1973 on virtually every clinical referen...
The Army stopped taping. The Marines did not.
Both services replaced the tape test with waist-to-height ratio in 2026 and then disagreed twice over. The Army set the...
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The kidney formula in your drug label came from seven data points
The 1976 equation that still decides anticoagulant doses was fitted to seven averaged points, drawn from 249 men after h...
10,000 Steps Was a Product Name. The Evidence Says 7,000.
The number is the name of a pedometer sold in Japan in 1965, chosen because it was round and the character for ten thous...
What Your A1C Actually Measures, and When It Does Not
A1C estimates average glucose over about three months by measuring what has happened to your red blood cells — so anaemi...
Your Fertile Window Is Six Days, and It Ends at Ovulation
"Ovulation is on day 14" and "ovulation is 14 days before your next period" are repeated as the same fact. They describe...
Same Body, Two Verdicts: What the Drink-Drive Limit Actually Depends On
At 0.058% blood alcohol you are under the limit in Singapore and over it in Johor Bahru. Malaysia cut its limit from 0.0...
Macros Explained: Where the Protein, Carb and Fat Targets Actually Come From (2026)
Macro targets traced to source: the government AMDR bands and 0.8 g/kg RDA versus 40/30/30 and the 1 g/lb gym rule, and...
How Much Water Do You Actually Need? The '8 Glasses' Rule vs the Evidence (2026)
No study ever backed '8 glasses a day.' What NASEM, EFSA and Singapore's HPB actually publish, why coffee counts, and ho...
Sleep Cycles and the 90-Minute Rule: What the Science Actually Says (2026)
Two NIH institutes give two different sleep-cycle lengths, and neither is a fixed 90 minutes. What the primary sources r...
Heart-Rate Zones: What '220 Minus Age' Gets Wrong (2026)
The wall-poster formula for max heart rate has a thin research pedigree. We trace every number to its source and show wh...
BMI, BMR and TDEE: What the Numbers Mean — and Why Asia Uses Different Cut-offs (2026)
What BMI, BMR and TDEE actually measure, the equations behind them, and why Singapore and Malaysia flag risk from BMI 23...
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