Can Alfalfa Induce Type 1 Photosensitization in Horses?

Alfalfa is a popular type of hay to feed horses because of its high nutritional value, but selecting this forage is not without risks. Many owners know that toxic blister beetles can contaminate alfalfa, and feeding this forage to overweight horses can cause additional problems due to its high calorie content. But in recent years, another health risk associated with alfalfa has surfaced: its apparent ability to cause photosensitization (a sensitivity to sun exposure) in horses.

To delve further into this issue, a group of researchers in California r

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