In almost all organisms, NADPH-dependent reductases catalyze the re-reduction of the LMW thiols [120]
As previously mentioned, safety concerns related to herbal products can be mainly attributed to the herbal ingredient itself, conventional drug-herbal medicine interactions, and contamination or adulteration of herbal remedies with potentially toxic compounds such as heavy metals (Broussard et al., 2010)
Schmidt, H., Caldwell, B., Mollet, A., Leimer, H.-G
Vitamin B12 is a water-soluble nutrient, which means it has an exceptionally high safety profile
Research, mostly in labs or small human pilot studies, hints that it may help with skin repair, collagen building, calming inflammation, and even nerve support
doi: 10.1016/j.nut.2015.09.003 233 LiNWangQWangYSunALinYJinYet al