Disclaimer: As I live in a tropical country, I have never seen chestnuts before.
I was experimenting with chestnuts, after i roasted and peeled them, I read that you’re not supposed to eat the hairy skin of the chestnut. Is it poisonous?
There are two reasons chestnuts are usually eaten fully peeled:
Note that the skin is not poisonous, but depending on the intended use1 of the chestnuts, it’s probably a good idea to really take the time to clean the nuts properly. If prepared right and still hot, the skin should come off easily.
1 Think purée, desserts or marrons glacés. If I buy roasted chestnuts on the street, I just peel as good as I can and don’t bother with tiny pieces of skin.