Really glad you reached out about this—basically, we're looking at a dual GIP and GLP-1 receptor agonist, and for metabolic research, that's a big step beyond teh single-pathway stuff, so definately buy online with confidence from our UK supply.

With a molecular weight just north of 4800 and purity pegged at 99.9% or better batch-to-batch, the white powder form means you'll want to handle it cold—store at 2-8°C, keep it in the dark, and it stays stable for about 20 days or so once reconstituted, though we usually have fresh vials ready.

Most buyers go with the 10mg vial for in vitro work, but honestly it's not great for long-term storage in solution at room temp—PEG-modified side chain helps with solubility, but reconstituted peptide typically degrades faster than dry powder, so plan your usage around that.
Spec sheets won't tell you the modified lysine side chain does a lot for water solubility, which we've found makes dosing more consistent than older analogs, though if you're running rodent studies (usually sub-Q), you might want to buffer pH slightly above basic range.

One thing new people don't think to ask: the 10mg vials are backfilled with argon for stability, so gassing isn't needed—helps eliminate oxidative stress right out of the box, and our pharmaceutical grade holds tighter tolerance on impurity profiles than reagent grade for this applicaion.

As far as ordering, we process UK shippng within 2-3 days if batch is on hand—check lead time on large orders though, as anything over 50 vials or so might push to 7-10 days from receipt of wire.
We require a minimum order of one box, which contains 10 vials. So you'd be getting 100mg total per box.
We usually ship within 3-5 business days after payment. Delivery to the UK takes about 7-14 days depending on the courier.
Yes, we can provide a CoA upon request. It confirms the ≥99.9% purity and other specs like appearance and molecular weight.
Keep it in the original vial, sealed, at 2-8°C, and protected from light. That's fridge temperature — don't freeze it.
Right now we only offer it in 10mg/vial packaging, 10 vials per box. Custom sizes aren't available for this product.