N&H TOP LINE: Happy cows make more nutritious milk

Serotonin shows potential to increase calcium levels in both the milk and blood of dairy cows, but breed differences may exist.

Daily infusions with a molecule commonly associated with feelings of happiness were shown to increase calcium levels in the blood of Holstein cows and the milk of Jersey cows that had just given birth.

The results, published in the Journal of Endocrinology, could lead to a better understanding of how to improve the health of dairy cows and keep the milk flowing.

Demand is high for milk rich in calcium: there is more calcium in the human body than any other mineral,

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