Vitamin D3-K2/MK7 is safe, effective, and made in the USA. Vitamin D3 is necessary for a healthy immune system and strong bones. My passion is to create functional nutritional and naturopathic formulas that are synergistic and non-toxic. The base is coconut, veggie caps, no toxic stearates, coloring, etc. All ingredients are sourced in the US. Did you know that One of vitamin D3's many functions in the body is to increase the production of calcium, which is essential to bone mineralization. Careful which Vitamin K2 you are taking! Vitamin K2 acts like a chaperone for newly created calcium ions, leading them away from your arteries and soft tissues, where they can do harm, and into your bones and teeth, where they provide crucial support. In fact, vitamins K2 and D3 are far more effective at supporting bone health together than either one is on their own. Did you know there are Two Main Forms Of K2? Two main forms of Vitamin K2: MK-4 and MK-7. Structurally, both versions are quite similar, however, the source of each one are very different. For example, MK-4 resides in the fat content of pasteurized eggs, meats, and dairy, while MK-7 primarily consists in fermented foods, like cheese and natto. MK-7 is highly bio-available