B-vitamins help create red blood cells, which carry oxygen and nutrients to the scalp and hair follicles which is important for hair growth. Biotin in particular is the most well-known B vitamin for hair health, but the truth is, B1, B2, B3, B6, B12, and folate (B9) also play an integral role. Temporary hair loss caused by vitamin B deficiency can trigger a genetic hair loss condition that can often be permanent. For this reason, consuming these vitamins in your diet more regularly is vital. When your body is not receiving the proper nutrients, it will make efforts to conserve energy for vital functions. Hair growth will be one of the first processes affected.
According to studies, if you have noticed your hair turning grey lately, it could be a sign that you may be deficient in B12. A 2015 report published in the journal Development noted various deficiency studies, including vitamin b12 deficiency, and the connection to greying hair.
The following symptoms may be a sign of not consuming enough B vitamins:
Early gray hair
Lack of energy