Q: Cats and many mammals have this in common with close to 70% of the human population. What is it?
A: They are lactose intolerant.
Just like humans, some cats can’t digest lactose, a milk sugar that’s found in dairy. The only time in a cat’s life when its body actually has enough of the enzyme lactase to properly digest lactose is at birth and during its early years of life. This is so the cat can feed off of its mother’s milk. After that, less and less lactase is produced, resulting in potentially increased digestive complications.
While most infants can digest lactose, many people begin to develop lactose malabsorption—a reduced ability to digest lactose—after infancy. Experts estimate that about 68 percent of the world’s population has lactose malabsorption.1
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