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Actually came through our US distribution hub just last week with a fresh batch of the retatrutide lyophilized powder, and it's testing out at that ≥99% purity you'd expect for metabolic work — we're seeing roughly 4.1kDa molecular weight confirmed on the HPLC from each lot.
Most buyers in teh UK and EU specifically ask about the 5mg or 10mg vials for weight management and glucose metabolism studies, though it's really not suited for anything beyond in vitro or in vivo research application since it's not formulated for human use.
Storage is critical here because what it does is demand consistent -20°C conditions away from light, or you'll lose stability within months — shelf life holds at 24 months if you keep it cold, but we usually have stock ready to ship within 20 days or so.
We've handled the import docs for US buyers on these for a while now, and the white to off-white lyophilized cake reconstitutes easily in sterile water or bacteriostatic water; the 10-vial box packging makes it straightforward for labs running multiple dose groups.
One thing you might not think to ask: vials come with a slight vacuum seal, so if you pop the cap and there's resistance leading to little puff of pressure, you're good; a flat top sometimes means the freeze-dry cycle wasn't ideal, though that's pretty rare with our suppiler.
Honestly, compliance filings for the UK and EU are included in the price — we've got the COA and SDS ready, and the molecular weight tolerance is tighter than what you'd get from some no-name resellers.
