top of page

Simple D-3 provides a clinically relevant serving of 5,000 IU (125 mcg) of vitamin D3 in a highly absorbable form alongside vitamins K1 and K2 (as MK-4), and geranylgeraniol (GG) to support bone, immune, and cardiovascular health.* This new and improved formula provides a patented form of GG extracted from annatto seeds. Geranylgeraniol (GG) is a compound that plays critical roles in numerous biological processes affecting organs and tissues throughout the body. 


Research suggests that combined supplementation of both vitamins D and K may be more supportive than either vitamin alone for both bone health and cardiovascular health.* Vitamins D and K work as a team! You need both! This product now uses Top Function’s new and improved Evail™ system technology that combines quillaja extract with medium-chain triglycerides (MCT) for improved nutrient bioavailability.*


*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Simple D-3

  • “My Doctor recommends this one because it had vitamin K which is important to take, when you take D. I and everyone in my family takes one each day. Most people are deficient in vitamin D and it’s so important for many aspects of healthy function.”


    “Love this brand. I have been taking it for a couple of years now and have increased my levels. I also agree with what someone else said about taking it with food that has fat content. It is necessary for absorption. The K1 and K2 are very important.”


    “My vitamin D level tested low so I started supplementing with these. When I had my D tested after 3 months of supplementation with these, my levels had almost tripled and were in the high end of the normal range. I have noticed pretty dramatic improvements in my skin, and mood among other things. I am now taking every other day to maintain D levels and will retest again in 3 months to make sure they are still on target.”

bottom of page