Vitamin K is a group of similar fat soluble molecules, the most common being K1 and K2. Vitamin K1, also known as phylloquinone or phytonadione, is a component of dietary supplements. Vitamin K1 has benefits such as functioning as a coenzyme for blood clotting. A vitamin K deficiency may result in weakened bones and uncontrolled bleeding. Current adequate intakes (AIs) for adult women and men are 90 and 120 μg/day. Netchem is a supplier of vitamin K1. You can buy vitamin K1 by clicking the “Get a Quote” button and filling out the form below.