vit b12 injection causing anxiety Vitamin for & Mood: What Science Says Understanding the B12 Vitamin Shot:

Rare mutations in this transporter (SLC52A2 gene) cause Brown-Vialetto-Van Laere syndrome, which is a rare neurological disorder that may be helped by riboflavin supplementation in some cases.[ref] MTHFR and vitamin B2 benefits: The MTHFR gene codes for the enzyme needed to convert folate to methylfolate, a key component in the methylation cycle

doi:10.3390/biom12010129 Pogribna M, Melnyk S, Pogribny I, Chango A, Yi P, James SJ

It is generally believed that eating a healthy diet will provide adequate vitamin B12 for most people

Many people struggle to maintain healthy B12 levels through diet alone, especially vegetarians, vegans and those with absorption difficulties

Label--Peptide Structures

Other than that, just do the right things for hair health in general