Happy Cows Produce More Nutritious Milk

Researchers have found that the happy hormone serotonin can boost levels of calcium in the blood and milk of dairy cows. Serotonin is considered a happy hormone because it alleviates mood, helping keep depression at bay. In a study published in the Journal of Endocrinology, the researchers detailed how daily infusions of serotonin increased calcium levels in the blood and milk of Holstein and Jersey cows, respectively.