Vitamin K1, also known as phylloquinone, is a fat-soluble vitamin that plays a crucial role in blood clotting and bone health. It is the primary form of vitamin K found in plants and is abundant in leafy green vegetables like spinach, kale, and broccoli.

The best sources of vitamin K1 are green leafy vegetables such as kale, spinach, and broccoli. Brussels sprouts, Swiss chard and parsley are also great sources.

Vitamin K1 primarily supports blood clotting and bone health. It may also have other benefits, such as supporting cardiovascular health and assisting in the regulation of blood sugar levels.

Vitamin K1 supplements are generally not recommended for individuals taking blood-thinning medications like warfarin, as they can interfere with the medication's effectiveness. If you are on such medications or have any concerns, consult with a healthcare professional before taking prenatal supplements.

Vitamin K1 (phylloquinone) and vitamin K2 (menaquinone) are two forms of vitamin K with distinct functions and sources. Both vitamins are involved in blood clotting and bone health, but Vitamin K2 additionally plays a role in directing calcium to the bones and teeth while preventing its accumulation in soft tissues like arteries. Both forms of Vitamin K are essential for health.

Ellement is one of few brands that includes both Vitamin K1 and K2.

Less than 15% of prenatal supplement brands include both forms, and over one-third (38%) of prenatal supplement brands include no Vitamin K at all.