At the start of lactation dairy cows enter a stage of negative energy balance. The reason behind this is that energy output for milk production is higher than the energy intake from the consumed feed. Body reserves in the form of fat will be mobilized and this may lead to fatty liver and (subclinical) ketosis. Choline is known for its positive effects in such cases. This article deals with the question of what exactly is the role of choline and in what form choline should be supplied.
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