Vitamin K is included in Ixonix Vitamin D with K2 because of its unique partnership with vitamin D. Vitamins K and D work together to support calcium absorption and the delivery of calcium to the bones.

At least two naturally occurring forms of vitamin K have been identified and are known as K1 and K2. While there are many similarities between these two forms of vitamin K, the most significant difference between K1 and K2 is their chemical structures, which provide for different pharmacokinetic properties.