Page 4 of articles about vitamin
The influence of vitamin D3 in piglets' growth and health
Vitamin D deficiency syndromes in swine (II)
We have long known that of all the species tested, piglets are born with the lowest circulating levels of 25(OH)D.
Vitamin D deficiency syndromes in swine (I)
Vitamin D is normally produced following skin exposure to ultraviolet-B. Since most piglets (and humans too!) are raised in climate controlled housing and born year-round, direct access to sunshine is often limited, even in the summer. Fortunately, vitamin D can be added to diets to meet the animals' need for vitamin D.