I'm hopeless with anything to do with math like chemistry, physics, or accounting. But biology has always been my forte. So I guess I'm half-terrible in science.

Anyways, here are a few reports (should be no paywall but let me know otherwise) that you might want to have a look at. You may have seen them already, but just in case.

https://onlinelibrary.wiley.com/doi/full/10.1046/j.0926-9959.2001.00282-5.x

https://www.hilarispublisher.com/open-access/improvement-in-hair-loss-and-better-hair-quality-with-vitamin-therapy-in-monilethrix-2471-9323-1000113.pdf

And I'm not sure what's going on with the counselor of yours. I mean, even I'd get offended if the person I'm having serious discussions is being casual about it, such as munching on some snacks.