Vitamin D is a fat-soluble vitamin that plays an important role in the health of your immune system, heart, bones, muscles, brain, & mental health, which is why vitamin d3 and k2 supplements are commonly used to support overall wellness. It can be produced by the body when exposed to UV rays from the sun. The best food sources include egg yolks, fatty fish, liver, and grass-fed cheese & butter, though many people still rely on vitamin d3 and k2 supplements to meet daily needs. Vitamin K2 helps ensure that the calcium is directed to your bones and teeth rather than building up in your arteries, making it an essential companion to vitamin D in vitamin d3 and k2 supplements. It is estimated that over 70% of Americans are deficient in vitamin D due to factors such as limited sun exposure, dark skin pigmentation, age, certain medical conditions, and dietary habits. For this reason, we recommend making a high quality vitamin d3 and k2 supplements part of your daily longevity routine. Our High Potency D3+K2+Calcium formula delivers therapeutic dosages found in premium vitamin d3 and k2 supplements, along with BioPerine (black pepper) to ensure maximum absorption! These vitamin d3 and k2 supplements are made in the USA at a GMP & NSF Certfied and FDA Registered facility. Every batch is tested for purity, potency, & safety by an independent 3rd party lab.