High Purity Continental Peptides Retatrutide for Weight Loss Research (10mg/15mg/20mg)

You're looking at a peptide that hits GLP-1, GIP, and glucagon receptors—basically a more aggressive tool for metabolic research than single-pathway analogs. We've been shiping this one for about 18 months now, and the HPLC-verified purity consistently runs above 99%, usually 99.2-99.5% depending on the batch. It arrives as a in a sealed glass vial, not pre-mixed, so you'll need bacteriostatic water for reconstitution (typically 1-2 mL depending on your target concentration).

The molecular weight sits at 4113.6 g/mol, and the CAS is 2381089-83-2 for your cross-referencing. 10mg is the most common starting point for dose-response work, though we see plenty of labs ordering 15mg or 20mg for extended studies. One thing we've noticed—if you're doing repeated dosing over 10-14 days, the 20mg vial cuts down on reconstitution prep time significantly. Storage is straightforward: unopened vials go to -20°C, and once you reconstitute, keep it at 2-8°C. Most buyers find the 24-month shelf life plenty generous.

We don't recommend this for cell-based viability assays that run longer than 48 hours at 37°C—the peptide tends to degrade faster in those conditions than some less complex constructs. It's better suited for in vivo metabolic studies or receptor-binding work where you can control the tempearture curve. The COA our company provide covers both HPLC and MS data, and we've got the raw spectral files if your PI wants to dig into the purity profile. Honestly, for most research protocols, the 99% threshold is sufficient; going higher than that usually doesn't change outcomes unless you're working with extremely sensitive detection methods.

Lead time is roughly 5-7 business days for standard orders, but if you need 50 vials or more, we usually have stock but confirm lead time—sometimes it pushes to 10 days when demand spikes. Pricing scales with volume: single vials run about $89 for the 10mg, $119 for the 15mg, and $149 for the 20mg. We don't do MOQs below 3 vials because the vial sealing process has a fixed minimum run—it's just how the lyophilizer cycles work. Anyway, if you're ordering 12 vials or more, the per-unit cost drops about 15% across all sizes.

One detail that catches some researchers off guard: reconstituted solution has a slight opalescence when first mixed—it clears within 2-3 minutes at room temperature, so don't panic and toss it. That's form residual acetate buffer in the lyophilization cake, not contamination. Also, if you're planning to aliquot for multiple users, we suggest sterile-filtering through a 0.22 micron syringe filter before dispensing, even though the vial is sealed—it's just cheap insurance against particulate introduction during reconstitution. We've had labs use it for metabolic weight loss research in rodent models, and the dose-response curve is noticeably steeper than with semaglutide analogs, so start lower than your usual dose range.