was ist vitamin k3 — can a DNA test help?

Vitamin K3 (menadione) is a synthetic form of vitamin K used in some supplements, but it is not recommended for oral use due to potential toxicity (e.g., liver damage, hemolytic anemia). A DNA test cannot reliably tell you whether you need vitamin K3 or how you metabolize it. While genes like VKORC1 and GGCX influence vitamin K metabolism, they relate to natural forms K1 and K2, not K3. Evidence for any benefit of K3 is weak, and risks outweigh potential gains. A genetic test for vitamin K3 would be misleading and lacks clinical validation. If you suspect a deficiency, consult a doctor and consider proven sources of K1/K2 instead.