Yes, vitamin D3 and K2 supplements are usually considered Harmless and well-tolerated when taken in proper doses. Increased amounts of the pigment melanin while in the epidermal layer of your skin cause darker pores and skin and decrease the pores and skin’s power to make vitamin D from sunlight [1]. https://vitamin-deficiency87420.shotblogs.com/little-known-facts-about-vitamin-k2-supplement-42222267