What should I know about vitamin k3 was du wirklich wissen musst#vitamin k3 im vergleich zu k1 und k2?

Vitamin K3 (menadione) is a synthetic form of vitamin K that differs fundamentally from the natural forms K1 (phylloquinone) and K2 (menaquinone). K1 is found in green leafy vegetables and is essential for blood clotting; K2 is produced by gut bacteria and supports bone health and vascular calcium regulation. K3, however, is not naturally occurring and is banned for human oral supplementation in many countries (e.g., USA, EU) due to its potential to cause oxidative stress, hemolytic anemia, and liver toxicity. It is still used in some animal feeds, but for humans it is considered unsafe. Claims that K3 is 'more effective' than K1 or K2 lack solid scientific evidence and are often based on outdated or misleading marketing. Anyone looking to improve their vitamin K status should rely on natural K1 and K2 from diet or reputable supplements. The evidence for K3 is mechanistic and regulatory, not clinical. Safety note: Do not take K3 supplements.