poorer source of o-tocopherol and B-carotene compared with fresh forage (Kay et al., resu whether milk derived from a diet rich in fresh for ages (commonly organic) contains more B and o-tocopherol than milk from animals consuming larger amounts of concentrates (commonly conventional) are inconsistent, as concentrates can be supplemented with vitamins. Butler et al. (2008) reported higher amounts of o-tocopherol and B-carotene in bulk milk samples from organic and LI conventional farms compared with milk from HI conventional farms. Higher concentrations of o-tocopherol and B-carotene in organic milk were also reported by Bergamo et al. (2003) and Slots et al. (2008). Slots et al. (2008) observed that the overall difference in o-tocopherol concentration between the milk varieties was less significant (P< 0.023) than that for individual stereoisomers. The natural stereo isomer RRR o-tocopherol was significantly higher in organic milk, whereas the synthetic 2R stereoisomer of o-tocopherol was significantly higher in conventional milk (P 0.001) Similar