Start here
What research peptides are, the UK regulatory position, and what to check before ordering.
What a peptide is, how it differs from a protein, why sequences are studied in vitro, and what the phrase “research grade” does and does not describe.
7 min read Are peptides legal in the UK?How UK medicines law treats research peptides, what an absent MHRA marketing authorisation means, and where research supply differs from a medicine.
6 min read Buying research peptides in the UK: what to checkThe specifications worth comparing between suppliers, the ones that mean nothing, and the handling checks that decide whether material arrives usable.
6 min read What “research use only” actually meansResearch-use-only is a basis of supply, not a disclaimer. What the designation covers, what it excludes, and where responsibility sits with the purchaser.
5 min readCompound guides
One guide per compound in the catalogue: what it is, what is studied, and how it is supplied.
Tirzepatide is a 39-residue dual agonist at the GIP and GLP-1 receptors. What that means, how the molecule resists breakdown, and how it is supplied.
6 min read What is cagrilintide?Cagrilintide is a long-acting amylin analogue acting at the amylin and calcitonin receptors — a different receptor family from the incretin agonists.
4 min read What is ipamorelin?Ipamorelin is a pentapeptide ghrelin receptor agonist, studied for its selectivity relative to earlier growth hormone secretagogues.
4 min read What is tesamorelin?Tesamorelin is a stabilised analogue of growth hormone-releasing hormone, acting at the GHRH receptor rather than the ghrelin receptor.
4 min read What is MOTS-c?MOTS-c is a 16-residue peptide encoded in mitochondrial DNA rather than the nuclear genome — an unusual origin that is the interesting part.
4 min read What is GHK-Cu?GHK-Cu is a three-residue peptide holding a copper ion in a coordination complex. Why the copper is part of the molecule, not an additive.
5 min read What is Melanotan II?Melanotan II is a cyclic analogue of α-MSH that activates melanocortin receptors non-selectively. Why the non-selectivity is the defining feature.
4 min read What is Semax?Semax is a heptapeptide built on the ACTH(4–10) fragment with a Pro-Gly-Pro tail — an ACTH derivative with the hormonal activity removed.
4 min read What is Selank?Selank is a heptapeptide built on the immune-related tetrapeptide tuftsin with a stabilising Pro-Gly-Pro tail. What that origin implies.
4 min read What is BPC-157?BPC-157 is a 15-residue synthetic peptide corresponding to a partial sequence of a protein found in gastric juice. What is and is not established.
5 min read What is TB-500?TB-500 is a synthetic fragment of thymosin β4, usually the actin-binding region. Why the name is ambiguous and what to confirm before ordering.
5 min read What is the Glow peptide blend?The Glow blend combines GHK-Cu, BPC-157 and TB-500 in one cartridge. What each component is, and what a fixed-ratio blend can and cannot be used for.
5 min read What is KLOW peptide?KLOW combines GHK-Cu, BPC-157, TB-500 and KPV in one cartridge — the Glow components plus a fourth. What KPV adds, and what the format constrains.
4 min read What is the Wolverine stack?“Wolverine stack” is the informal name for BPC-157 paired with TB-500. Where the name came from, what it does not standardise, and what each component is.
6 min readComparisons
Where two compounds are studied for overlapping reasons, what actually separates them.
One adds the glucagon receptor to the other’s two. What that difference in receptor coverage does and does not imply, and how the cartridges differ.
5 min read BPC-157 vs TB-500Unrelated parent molecules, and one has a measurable target while the other has none. Why that asymmetry matters more than any similarity.
5 min read Semax vs SelankBoth are Russian-developed heptapeptides with the same stabilising tail, built on completely unrelated fragments. What that shared design implies.
4 min read Tirzepatide vs cagrilintideThese two are studied in overlapping contexts but act on unrelated receptor families. Why they are not alternatives to each other.
4 min readHandling & formats
Storage, stability, and how the pre-mixed pen format differs from a lyophilised vial.
Why 2–8 °C, why light matters, why not to freeze a solution, and why cold-packing covers transit only. The reasoning behind each condition.
6 min read Bacteriostatic water and peptide solution stabilityWhat bacteriostatic water is, what the benzyl alcohol in it does and does not do, and why the diluent is only part of what governs stability.
5 min read How a pre-mixed peptide pen worksThe dial meters volume, not mass — so what one increment delivers depends entirely on the concentration in that cartridge.
5 min read Pre-mixed peptide pens vs lyophilised vialsOne removes the reconstitution step, the other keeps control of concentration and a longer shelf life. An honest account of both sides.
4 min read Peptide blends vs single compoundsOur blends publish the split, so per-component concentrations are known. What a fixed ratio does and does not cost you, and when to buy separately.
6 min readEverything in this library is reference material about compounds supplied strictly for laboratory research use only. Nothing here is medical, veterinary or legal advice, and nothing here describes administration to humans or animals. See the Research-Use-Only Policy and Terms & Conditions.
