One of the biggest mistakes I see with blood testing is people preparing in ways that can completely skew their results… without realising it. And honestly, most people are never properly told this beforehand. Things like: → fasting too long → hard training the day before → dehydration → alcohol → supplements → sauna use can all impact blood chemistry significantly. For example: fasting longer than around 10–12 hours can artificially elevate markers like serum iron and increase stress hormones. Intense exercise before testing can temporarily increase: → liver enzymes → inflammation markers → glucose → white blood cells Sauna use and dehydration can concentrate the blood and alter electrolytes, kidney markers, haematocrit, and more. Even supplements can skew results: biotin can interfere with thyroid testing, iron supplements can affect iron markers, etc. This is why interpreting blood work properly isn’t just about the numbers. It’s also about: → context → lifestyl...