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Solvent-carrier risk: Vehicles such as DMSO are potent skin-penetration enhancers with their own irritation and contamination-shuttling risks

Most online vials are research-grade, with no guarantee of purity, sterility, or accurate dosing, and the FDA warns against products labeled "research only" or "not for human use." Buying and using these for yourself also sits outside the law

They are classified as research chemicals in many regions and may be restricted by anti-doping agencies like WADA

Its claim to fame in the research community is its pleiotropic effectsmeaning it appears to influence multiple biological pathways simultaneously

Vitamin B12 may play a role in fertility by supporting proper hormone balance and reproductive health." Agyeman also says that vitamin B12 is involved in bone metabolism and mineralization, so having adequate levels of B12 is especially important for women as they are more prone to bone disorders like osteoporosis