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A recent study highlights the importance of NAD+ metabolism in regulating the behavior of both innate and adaptive immune cells, which are crucial players in our body's defense system

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In April 2026, the UK medicines regulator opened an investigation into peptide clinics making health claims about compounds they cannot legally sell as medicines [1]

While both products are manufactured under strict pharmaceutical standards, their safety after opening depends heavily on how they are used in practice: Shelf Life After Opening One of the most important differences between the two solutions is how long they remain safe once opened