This hub collects every peptide comparison published on Bulk Peptides. The first group is written for purchasing: side-by-side specifications, cost per milligram at each step of the volume ladder, and advice on which vials to combine in one cart. The second group is our analytical reading, where individual pairs are examined for sequence, mass and structure in more depth.
If you are pricing a multi-compound order, start with the buying comparisons, then check the bulk pricing ladder, which counts every vial in the cart toward one discount.
Buying comparisons: price per mg and vial choice
- BPC-157 vs TB-500: both single-vial sizes and both blends priced at all five tiers, with a worked example of combining the two compounds to reach 35% off and a note on why the ranking flips when you buy by the micromole.
- Sermorelin vs Tesamorelin vs CJC-1295: three GHRH analogs priced per milligram and per micromole, plus a simple way to build a near-equimolar three-analog panel inside a discounted cart. Also explains where the CJC-1295 + Ipamorelin blend fits.
- GLOW vs KLOW: two blends at the same list price, separated only by 10mg of KPV. Covers what the blend saves over singles, the mole share of each component, and ordering both as a matched pair.
Analytical comparisons: the deeper reading
Repair-peptide and blend chemistry
- Thymosin beta-4 vs the TB-500 fragment: why a seven-residue acetylated fragment and a 43-residue protein should never be treated as interchangeable, and how mass settles which one is in a vial.
- GLOW blend composition analysis: the three components of GLOW examined one by one, with attention to how a mixed vial should be characterised.
Growth hormone axis analogs
- CJC-1295 with DAC vs without DAC: what the drug affinity complex adds chemically, and why the two forms are distinct compounds rather than two grades of one.
- GHRH analogs vs growth hormone secretagogues: the two receptor families behind this category, and which catalogue peptides belong to each.
- GHRP-2 vs GHRP-6: two hexapeptides compared on sequence and molar mass, useful for anyone checking identity by mass spectrometry.
- Hexarelin vs GHRP-6: how a single methyl group separates the two, and what that means analytically.
Neuropeptides, mitochondrial peptides and melanocortins
- Selank and Semax: two derivatives of endogenous peptides set side by side, from parent sequence to the stabilising additions.
- MOTS-c and SS-31: a mitochondria-derived peptide and a synthetic mitochondria-targeted tetrapeptide, compared on origin, structure and the questions each is studied for.
- Melanotan 1, Melanotan 2 and PT-141: a linear and two cyclic melanocortin analogs compared on structure, including the lactam bridge.
Using these comparisons to plan an order
Most comparisons on this list involve compounds that are bought together, which matters for cost. Because the discount counts vials across the whole cart, a pairing like Selank and Semax, or MOTS-c and SS-31, reaches a tier faster when both are ordered at once. Before sizing an order, convert milligrams to moles with the molarity calculator: several of these pairs differ widely in molar mass, so the same milligram count gives different numbers of molecules.
All compounds are third-party tested by HPLC and purity testing at 99%+ purity. Certificates for some products are published on the COAs page, and cap and crimp colour links each vial to its certificate. Full list prices are on the price list, and orders beyond a few cases can be quoted through wholesale supply.
For laboratory research use only. Not for human or veterinary use.
