From Fleece to Grease
Imagine if you had to live out in the fields in all weather like a sheep. You would get pretty grubby! When a sheep's fleece is removed to make wool it has to be washed.
As long ago as 1600BC people found that the water they used to wash wool fleece had a greasy layer on top. They collected it and found that it helps protect human skin, just like it helps protect the sheep. They also used it to water-proof tents!
The main ingredient in the grease from the wool is a material called lanolin.
Why?
Why do you think sheep have this grease in their wool?
They don't shower | Sheep don't use shampoo | They roll around in the mud
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