the piglets came from eight litters delivered by sows , four of which were given a ration with an addition of vitamin e ( tocopherol acetate -- 100 i. u. per kg of feed ) and selenium ( 0.1 ppm se as na2seo3 ) during gravidity , and another four were given these supplements only during lactation .
C0042874
vitamin e
C0078373
tocopherol acetate