What should I know about vitamin k3 was du wirklich wissen musst?

Vitamin K3 (menadione) is a synthetic form of vitamin K not found in nature. Unlike vitamin K1 (phylloquinone) and K2 (menaquinone), K3 is banned for human use in many countries due to toxicity – it can cause oxidative stress, liver damage, and hemolytic anemia. It is still used in animal feed but is not considered safe for humans. MyBody-X DNA or metabolism tests do not directly measure vitamin K3 levels; they focus on genetic variants affecting vitamin K metabolism (e.g., VKORC1, CYP4F2). The evidence for K3 is mostly mechanistic and from animal studies; human clinical trials are lacking. If you see a supplement containing K3, be cautious: safe dosage is unknown, and there are no proven health benefits over K1/K2. Consult a doctor before taking K3. Marketing claims often exaggerate its effects. Bottom line: K3 is not a harmless vitamin – it is best avoided.