The Research Journal

Peptide science, clearly referenced.

Independent, literature-backed explainers on research compounds — every claim cited to PubMed, every framing strictly research-use-only.

ARA-290: The Peptide That Tried to Split Erythropoietin in Two
Immune · Featured
ARA-290: The Peptide That Tried to Split Erythropoietin in Two

Cibinetide was engineered to keep erythropoietin's tissue-protective signalling while abandoning its blood-building job. The molecular logic is elegant; the human evidence, gathered mostly in small neuropathy trials, is real but early.

Scientific desk4 min read
AICAR: The “Exercise in a Pill” That Couldn’t Outrun Its Own Trials
Metabolic & longevity
AICAR: The “Exercise in a Pill” That Couldn’t Outrun Its Own Trials

A small molecule made untrained mice run dramatically further. Two decades and several large human trials later, acadesine's record is a study in how rodent spectacle and clinical reality diverge.

6 min
LL-37: The Self-Defence Peptide That Also Turns on the Self
Immune
LL-37: The Self-Defence Peptide That Also Turns on the Self

Humans carry a single cathelicidin. It kills microbes, calls in immune cells and helps wounds close — and, in the wrong context, teaches the immune system to attack its owner. A look at the most genuinely double-edged peptide in innate immunity.

5 min
Sermorelin: The Secretagogue With a Real Licence and a Narrow Mandate
Hormonal
Sermorelin: The Secretagogue With a Real Licence and a Narrow Mandate

GRF(1-29) is the rare growth-hormone peptide with a genuine regulatory past — approved, marketed as Geref, then withdrawn for commercial reasons. But its documented history is diagnosis and childhood deficiency, not the longevity claims now attached to it.

5 min
SS-31 (Elamipretide): The Mitochondrial Peptide That Reached the Clinic — and Got Complicated
Metabolic & longevity
SS-31 (Elamipretide): The Mitochondrial Peptide That Reached the Clinic — and Got Complicated

Elamipretide is the most clinically advanced cardiolipin-targeting tetrapeptide ever tested — now an approved Barth-syndrome drug, yet with a trial record that is the field's sharpest cautionary tale.

5 min
PT-141 (Bremelanotide): The Melanocortin That Targets Desire, Not Plumbing
Sexual health
PT-141 (Bremelanotide): The Melanocortin That Targets Desire, Not Plumbing

An FDA-approved cyclic peptide that acts in the brain rather than the blood vessels: a narrow indication, a modest effect, and a melanocortin tax of nausea and pigment.

6 min
Kisspeptin-10: the master switch the body wrote, and pharmacology hasn’t finished
Hormonal
Kisspeptin-10: the master switch the body wrote, and pharmacology hasn’t finished

The decapeptide that orders GnRH neurons when to fire is among the best-mapped pieces of human reproductive physiology — and, candidly, still a research tool rather than a finished medicine.

5 min
Thymosin Alpha-1: The Approved Drug That Isn’t (in America)
Immune
Thymosin Alpha-1: The Approved Drug That Isn’t (in America)

A 28-residue thymic peptide is licensed for hepatitis across dozens of countries and drew attention during COVID-19, yet remains unapproved by the FDA. The evidence is real, large, and frustratingly uneven.

6 min
Cerebrolysin: The Most-Used Nootropic the West Won’t Register
Nootropics
Cerebrolysin: The Most-Used Nootropic the West Won’t Register

A porcine brain-derived peptide mixture prescribed across Eastern Europe and Asia for stroke and dementia — yet independent reviews are tepid, and you cannot fully say what is in the vial.

5 min
Tesamorelin: The Only GH-Axis Peptide With an FDA Licence — And What That Doesn’t Mean
Hormonal
Tesamorelin: The Only GH-Axis Peptide With an FDA Licence — And What That Doesn’t Mean

A stabilised GHRH(1-44) analogue is the one growth-hormone secretagogue in this catalogue with a regulatory approval behind it. That approval is narrow, conditional, and routinely misread.

5 min