(SW1030)Vitamin D3 - High Potency 1,000 Iu (25 mcg) 250 CapsSupports bone health plus immune and cardiovascular wellness Promotes calcium absorption in the body Most biologically active form of vitamin D Do you get enough of the powerhouse Sunshine Vitamin? The body manufactures some vitamin D on its own when it is exposed to sunlighthence the nicknamebut for people living in the northern latitudes where wintertime sun exposure is limited, the body's natural vitamin D production may not be enough.