I’ve been researching this myself. I’ve settled on thorne labs am pm multivitamin. I trust the company and take allot of their products but haven’t tried the multi yet so can’t officially recommend.

My hair began to grow intensively after taking a daily multivitamin for hair! The composition is rich in various trace elements that contribute to the activation of follicles. I accept these tablets twice a day. They are easy to swallow and do not have an unpleasant aftertaste. You need to take a couple of months to see a big difference, but you will see it if you stick to the regimen.