Discover articles on blood values, health and prevention. Clear, well-sourced explanations that help you understand your blood test and your results better.
A single testosterone value says little. Which symptoms matter, which five blood values tell the story together, and which dials you can actually turn.
What does your testosterone result actually mean? How to read total, free and SHBG together, and which reference ranges fit each age.
Your sleep stages in numbers: how long a cycle lasts, what percentage per stage is normal, and why your watch pie chart...
A sensor shows you what no fasting draw can. It just cannot see the thing an athlete most wants to know. Here is what yo...
Page one says "go easy on the weights" without a single number. Pressure during a maximal lift has been measured directl...
Deep sleep is the stage where your growth hormone peaks. How much you need, why it declines with age, and what actually...
Your eGFR looks alarming, yet your kidneys are fine. That is because creatinine comes from your muscle. Cystatin C sides...
Caffeine can improve your strength, endurance and focus. How much to take per kilo, when to take it and what in pre-work...
Better sleep pays off more than any supplement. What the science shows about sleep, performance and the blood values tha...
Oral substances and high-dose supplements can raise your liver values. Which values may change, and why medical guidance...
How many calories per day you need to stay at your weight is your maintenance level. Calculate it by sex and activity, a...
Your value tracks with heart risk, that part is real. But the large trials lowered homocysteine without lowering heart a...
A liver function test measures enzymes like ALT, AST and GGT. What a liver panel contains, how to prepare and how to rea...
Your scale gives a visceral fat number, but that number is an estimate. Here is how to read it, and what your blood show...
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