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[5] [6] Suppliers who market retatrutide as a 'research chemical' or 'peptide for laboratory use' may attempt to circumvent medicines legislation, but this does not render the purchase or importation lawful for personal use or clinical administration
I cover this IR calculation formula in much more detail and exactly how to do it and what to watch out for on my Internal Resistance Page, but I wanted to mention it here while going over these often misleading C ratings
While generic versions won't appear immediately, more affordable options are expected in 2026
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