
There are no studies to evaluate the presence of gold in cow milk and the yellow color of the milk is due to a pigment called beta-carotene.
However, research shows that the cow milk fat contains a coloring pigment called beta-carotene and factors like breed, stage of lactation, parity, milking-time, udder health status, pasture grazing, and seasonal calving can affect the color of the milk. There are no studies that say that cow milk can contain minerals like gold.
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