https://www.ncbi.nlm.nih.gov/pubmed/23909117 it seems B12 may not be so effective, but Korean Ginseng has recently been proven to be effective: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4582451/
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https://www.ncbi.nlm.nih.gov/pubmed/23909117 it seems B12 may not be so effective, but Korean Ginseng has recently been proven to be effective: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4582451/