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Both are preclinical and investigational, not approved for human or veterinary use

Vitamin B12 (cobalamin) helps protect the myelin coating of the nerves, vitamin B6 (pyridoxine) is vital in the metabolism of nerve cells, and vitamin (thiamine) B1 is an on-site antioxidant
Factors like your metabolism, body chemistry, and even your sensitivity levels can influence how you respond

Studies published in peer-reviewed journals have reported that Selank interacts with GABAergic and serotonergic systems