The rumor that hippo milk is pink has gained traction over the years, particularly after National Geographic shared the idea. However, the reality is that hippo milk, like milk from other mammals, is white or cream in color.
A biology professor from San Diego State University clarified that hippo milk is not pink, but the animal’s ‘sweat’ is. This sweat is not actually sweat, but a skin secretion that combines sunscreen and antibiotic compounds. It is produced by the hippo’s mucous glands and plays a crucial role in protecting its health.
The red and orange pigments in the secretion have antibiotic and sunscreen properties. The secretion moisturizes the hippo’s skin, regulates its temperature, and protects it from infections, which is particularly important as hippos spend a significant amount of time in muddy water.
While the secretion initially appears like human sweat, it gradually turns red, pink, or orange as the pigments react to sunlight. Over time, it turns brown. This secretion may occasionally mix with milk while a baby hippo is feeding, potentially giving the milk a pinkish color.
However, a curator at the Cincinnati Zoo and Botanical Garden emphasized that pink hippo milk is not normal. If the milk appears pink, it could indicate a health issue, likely involving blood. Therefore, despite the widespread rumor, hippo milk is not naturally pink.
