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If you ever reacted to B12 shots, the cause was likely not the B12, but some excipient in the mix

[13] Exposure to light can degrade vitamin B

However, vitamin B 12 is an essential vitamin and requirements are increased during pregnancy

But the peptides being promoted by influencers, celebrities and wellness gurus are different: Many have never been approved for human use and much of their purported evidence comes from studies in rats and other animals

And it's not just about the feeling of energy

This is the same mechanism that supports tissue repair, but it is a meaningful contraindication for anyone with active or recent malignancy