I hope you were being facetious about the beer as a source of B vitamins.

Those with a brain injury need many times the RDA (Recommended Daily Allowance) of B vitamins and other vitamins. The RDA is only a minimal standard based on weak science.

Plus, alcohol is contra indicated in brain injuries. There has been some studies that suggest mild to moderate alcohol may have a beneficial effect, but getting drunk at all is definitely counter to your brain's health. So, a glass of beer or wine may have a beneficial effect.

If I remember correctly, B vitamins are often used to combat a hang-over. I am not speaking from experience because a pint of beer will give me a miserable hang-over. Tried it once, never again.

Ginkgo Biloba has been studied extensively and its effects for the brain are much less that previously promoted.