The shea butter comes from two oily kernels within the shea tree seed. After the kernel is removed from the seed, it is ground into a powder and boiled in water.

1. It’s safe for most skin types Shea butter is technically a tree nut product. But unlike most tree nut products, it’s very low in the proteins that can trigger allergies.

Shea trees grow in the wild from West to East Africa - a vast strip known as the "shea belt". But the shea tree population has dramatically plummeted in recent year, it says.