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Unfortunately, the compounds suffer from poor in vitro metabolic stability (Engen et al., 2020)
Problematic ingredient combinations include high-concentration vitamin C, which can destabilize copper peptides and reduce efficacy
Along with discounts and insurance coverage, factors such as pharmacy and zip code can affect the final price
Treat these compounds with the respect their molecular complexity demands
However a vegan diet contains almost no sources of B12, which increases the risk of deficiency
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