was ist k3 vitamin — can a DNA test help?

Vitamin K3 (menadione) is a synthetic form of vitamin K not recommended for human consumption due to potential toxicity (oxidative stress, liver damage). In the EU, K3 is not approved as a dietary supplement. A DNA test cannot provide information about K3 requirements or intolerance because there are no validated genetic markers for K3. Research on vitamin K focuses on K1 (phylloquinone) and K2 (menaquinone) and genes like VKORC1 and GGCX, relevant for blood clotting and bone health. A genetic test for these genes might offer insights into individual vitamin K utilization, but not specifically for K3. Evidence for direct DNA testing related to vitamin K3 is essentially absent and classified as marketing. Rely on a balanced diet and medical advice before taking any supplements.