Albinism is caused by a lack of what?

wonder why this changes through the generations ?

Player #53553731, Pretend they are 'white multicultural people' just without skin colour. Special.

Saw a doc abt how Africans do something to become albanio for one reason is to become white it was very sad because they rub their skin or do something to the skin which makes them white I think it was on aljazzera