Suppose you have a friend who is going bald (they are not completely
bald yet). If they were trying to
prevent this, which treatment option
would you recommend to them and
why?

if they are balding from age, I would recommend a surgical hair transplant, but if you cannot get that find a hair regrowth serum.

if they are balding from diseases, such as Thyroid disease, lupus, and diabetes, I would recommend getting a wig/weave of your choice.

if you are looking to help prevent it, take good care of your hair, don't bleach/dye your hair, avoid heat damage, and look for a hair regrowth serum.

the answer to your question is (pancreas).