Each vial ships with its own lot and Certificate of Analysis
You need to query it and get it re-tested
While human studies remain scarce, emerging in vitro models simulating human gut conditions reveal variable microbiota responses to MPs, ranging from dysbiosis and inflammatory metabolite production to probiotic enrichment and metabolic adaptation (Fournier et al., 2023
Reference: Goldstein AL et al
So, while vitamin C itself doesnt stay long in the bloodstream, the benefits can last a day or two
Those pulses are driven primarily by two competing hypothalamic signals: growth hormone-releasing hormone (GHRH), which stimulates GH release, and somatostatin, which inhibits it