[smart (OP)]

Is it possible to grow stem cells from hair in order to make genetically-compatible medicine for the host?

What do you think?

[diverjohn]

Not from the hair; it is mostly protein. But if there are skin cells hanging onto the bulb of the hair, as it would be if plucked from the head instead of cut from the scalp using scissors, then these could be used.

[smart (OP)]

Not from the hair; it is mostly protein. But if there are skin cells hanging onto the bulb of the hair, as it would be if plucked from the head instead of cut from the scalp using scissors, then these could be used.

I agree. Thanks for writing and welcome to the forum, @diverjohn .

[evan_au]

Once the hair grows, the cells lose blood supply, and are all dead; you can extract DNA, but it is damaged.
You would need to have living cells (like from the hair root).

You would also need to treat them to revert to become stem cells that can be used for multiple purposes (not just producing hair).
https://en.wikipedia.org/wiki/Induced_pluripotent_stem_cell