व्हाउचर कोडसह सर्व ऑर्डरवर 35% सूट
liz west/flickr Drinking milk is one of the defining traits of mammals, but humans are the only species on Earth to digest it after infancy, though even now, more than 75% of the world's population is still lactose intolerant. After weaning, all other mammals, and most humans, cease producing lactase, the enzyme necessary to break down lactose, milk sugar.
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