If we are meant to understand from the Nazir that forbidding things which are really mutar in order to be "extra holy" is really not a positive thing (cf. y.Nedarim 9:1), then of what benefit are ...
One who takes a Nazarite vow cannot drink wine (or partake of product that uses grapes). I understand that this is to help the Nazir remain focused on God instead of being overcome by other forces ...
Can a Nazir cut the hairs on his face?