Vitamins D3 and K1 work synergistically to optimize calcium metabolism. Vitamin D3 increases calcium absorption from your gut, while vitamin K1 activates proteins that direct that calcium into your bones rather than soft tissues like arteries.
Taking them together ensures calcium goes where your body needs it most—strengthening bones while protecting cardiovascular health.

Vitamin K1 (phylloquinone) is primarily found in leafy greens and supports both blood clotting and bone health. Vitamin K2 (menaquinone) is found in fermented foods and animal products.
Both forms activate calcium-regulating proteins, though K2 stays in the bloodstream longer. This formula uses K1, which is highly effective for bone and arterial health when combined with vitamin D3.

Yes, always take Vitamin D3 Pro with a meal containing healthy fats. Both vitamin D3 and K1 are fat-soluble nutrients, meaning they require dietary fat for optimal absorption. Taking them with foods like avocado, nuts, olive oil, or fatty fish will significantly improve how well your body absorbs and utilizes these vitamins.

For many adults, 2,000 IU provides effective daily maintenance, especially when combined with sensible sun exposure and dietary sources.
However, individual needs vary based on factors like age, sun exposure, skin tone, and current vitamin D levels. If you have a known deficiency or limited sun exposure, your healthcare practitioner may recommend higher doses or testing your 25-hydroxyvitamin D levels.