Specialty Research Peptides ✦

Best DSIP – 15mg

DSIP is a nine-residue peptide first isolated in the 1970s from work on sleep-related factors in rabbit cerebral venous blood. Supplied lyophilised at 15mg per vial, which is $4.00 per mg. Its literature is older than most of this catalogue and correspondingly sparse by modern standards, with much of the primary work predating the analytical methods now taken for granted — a reason to read specific claims carefully rather than to dismiss them outright. Nine residues is a short synthesis, so confirm identity by mass spectrometry and check the fill weight rather than hunting subtle impurities. Research use only.

Best Epithalon – 10mg

Epithalon (Epitalon) – FEPITHALON (ALSO KNOWN AS EPITALON) IS A SYNTHETIC TETRAPEPTIDE STUDIED FOR ITS ROLE IN TELOMERASE ACTIVATION, GENE EXPRESSION MODULATION, AND OXIDATIVE STRESS RESPONSE. IT IS OFTEN USED IN RESEARCH FOCUSED ON AGING MECHANISMS, CIRCADIAN RHYTHM REGULATION, AND PINEAL GLAND FUNCTION.NOTE: SHIPPED IN FREEZE DRIED LYOPHILIZED FORM - REQUIRES RECONSTITUTION.

Best Glutathione – 1500mg

Glutathione is a tripeptide central to cellular redox chemistry, functioning through a thiol group that is oxidised in the reactions it participates in. Supplied lyophilised at 1500mg per vial, which is roughly a hundred times the fill of the peptides beside it, and that gap measures mechanism rather than strength: a molecule consumed roughly one-for-one must be present in proportion to the work required, whereas a signalling peptide can act repeatedly. Its specific vulnerability is the thiol itself, which oxidises on contact with air, so limit vial entries and headspace exposure more carefully than for an ordinary peptide. Research use only.

Best L - Carnitine

L-carnitine is a quaternary ammonium compound involved in the transport of fatty acids across the mitochondrial membrane, where they become available for beta-oxidation. Supplied at 500mg per vial. It is not a peptide, and a certificate describing it in peptide terms indicates analysis performed from a template rather than against what the material actually is; the appropriate characterisation is that of a small molecule. Like other compounds that participate stoichiometrically rather than by signalling, it is supplied in hundreds of milligrams rather than single digits, which is a consequence of how it works and not a measure of potency. Research use only.

Buy Melanotan II (MT-II) Peptide

Melanotan II is a cyclic peptide engaging the melanocortin receptor family, whose subtypes are distributed across several tissue types with distinct associated physiology. Supplied lyophilised, 10mg per vial at $3.50 per mg. It is not notably selective within that family, so a broad profile follows directly from where the receptors sit rather than from any defect. Verification differs from a linear peptide in kind: the characteristic failure is incomplete cyclisation, and the uncyclised form differs by too small a mass for spectrometry alone to resolve, so the chromatographic trace is the document that answers the question. Research use only.

Best MT-1 – 10mg

MT-1 is a linear melanocortin-receptor peptide, supplied lyophilised at 10mg per vial, which is $3.50 per mg. Being linear rather than cyclic changes its characteristic manufacturing failure: where a cyclic peptide can be left with an unclosed precursor that mass spectrometry struggles to separate, a linear chain fails by omitting a residue, producing a plainly different mass that competent analysis flags immediately. Neither this compound nor its cyclic neighbours has a widely circulated reference standard, which places more weight than usual on the identity of the analysing laboratory. Research use only.

Best NAD+

NAD+ is a nucleotide-derived coenzyme central to cellular redox reactions, present in every cell and maintained through synthesis and salvage pathways. Supplied at 250mg for $40 or 500mg for $55 — $0.16 and $0.11 per mg respectively. That it is essential is settled biochemistry; whether administering it raises the pool inside cells, where it would need to rise to matter, is genuinely unresolved, and the two claims are routinely elided. It is not a peptide, so a certificate written in peptide terms indicates a template rather than an analysis. Research use only.

Best PT-141 – 10mg

PT-141 is a cyclic melanocortin-receptor peptide drawn from the same structural lineage as Melanotan II but engaging the family more narrowly. Supplied lyophilised, 10mg per vial at $4.50 per mg. Narrower engagement means an observed result carries fewer candidate explanations, which suits a subtype-specific question and disadvantages one framed at the level of the family as a whole. As with any cyclic peptide the manufacturing step most likely to be left incomplete is ring closure, and the open-chain precursor sits too close in mass to separate by spectrometry alone, so ask for the chromatographic trace rather than the headline purity figure. Research use only.

Best Selank – 10mg

Selank is a synthetic peptide derived from a fragment of an endogenous molecule and then modified, so the sequence occurs nowhere in nature and nothing can be deficient in it. Supplied lyophilised, 10mg per vial at $4.50 per mg. Because it is short, the synthesis is among the more reliable in this catalogue and the realistic failure is a wrong molecule or a light fill rather than a subtly defective one, so confirm identity by mass spectrometry and check the stated quantity separately from purity. Its literature shares the access problem common to compounds of Russian origin: English summaries frequently cite one another rather than the underlying studies. Research use only.

Best Semax – 10mg

Semax is a synthetic seven-residue peptide developed by Russian researchers, an analogue of an ACTH fragment extended with a proline-glycine-proline tail that resists enzymatic cleavage. Supplied lyophilised, 10mg per vial at $4.50 per mg. It is unrelated to the similarly-spelled GLP-1 compound: under the WHO naming system a drug's class sits in its suffix, so a shared prefix carries no information. Six coupling steps make this a short, reliable synthesis, which shifts verification away from hunting trace impurities and toward confirming identity by mass spectrometry, confirming the sequence explicitly rather than the name, and checking fill weight separately. Much of the primary literature is Russian-language and hard to assess second-hand. Research use only.

Specialty

SLU-PP-332 is a synthetic small molecule rather than a peptide, and that distinction governs how it should be characterised: it acts as an agonist at the estrogen-related receptor family, which regulates transcription of genes involved in mitochondrial biogenesis and oxidative metabolism. Supplied lyophilised at 200mg per vial. Because it is not a peptide, a certificate describing it in peptide terms indicates analysis performed from a template rather than against the material; the appropriate characterisation is that of a small molecule. Published work is preclinical and rodent-based, so claims extrapolated beyond that are inference rather than finding. Research use only.

Best SS31 – 10mg

SS-31 is a four-residue peptide distinguished by an alternating aromatic and basic residue pattern, a charge distribution that causes it to concentrate at the inner mitochondrial membrane rather than distribute without preference. Supplied lyophilised, 10mg per vial at $4.50 per mg. That targeting is structural, a property of sequence and charge, so it cannot be conferred by quantity or formulation on a molecule that lacks it. Do not confuse it with mitochondrial-derived peptides such as MOTS-c, which are encoded within mitochondrial DNA: one claim concerns origin, the other concerns where an administered molecule accumulates. Three couplings make verification straightforward; confirm identity and fill weight. Research use only.