Vitamin E is essential , and supplementation to the diet is often needed to meet the requirements of cows . Current supplementation recommendation s may be overestimated in forage -based systems where grazing or grass -clover silages are the basal diet, with low to moderate levels of concentrate feed.

An update of the requirements and recommendations for vitamin E in organic dairy milk production is needed to explore the potential of reducing the supplementation level of vitamin E , thus reducing feed costs while ensuring animal health and welfare.

A systematic literature review was conducted to analyse the response to vitamin E supplementation, considering the animal’s life stage and the composition of the basal diet . Based on that, RELACS was able to update the vitamin E supplementation recommendations for organic dairy cows.