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Klarovel

Evidence-based peptide writing

Research-backed articles on peptides, protocols, and longevity science.

Every post on this blog is built around a single rule: the load-bearing claim has to point at a peer-reviewed source. The catalog spans five clusters: the GH-axis (CJC-1295, ipamorelin, tesamorelin, MK-677), the GLP-1 class (semaglutide, tirzepatide, retatrutide, cagrilintide), tissue healing (BPC-157, TB-500, GHK-Cu, KPV), cognitive peptides (semax, selank, dihexa), and longevity (NAD+, epitalon, DSIP, thymosin alpha-1). Pieces are reviewed against PubMed, ClinicalTrials.gov, FDA, EMA, Helsedirektoratet, FHI, and Legemiddelverket. We hedge claims the literature hedges and we name the gaps where the human-trial database is still light.

Explore by cluster

  • Growth-hormone axis

    GHRH analogues and GH-releasing peptides for body composition, recovery, and the IGF-1 lever. CJC-1295, ipamorelin, tesamorelin, sermorelin, MK-677, GHRP-2 and GHRP-6.

    Read the guide: The GH peptide axis

  • GLP-1 class + metabolic

    Incretin-receptor agonists for weight management and metabolic disease. Semaglutide, tirzepatide, retatrutide, cagrilintide, liraglutide. Class explainers, head-to-head comparisons, FDA label dosing and the compounding picture.

    Read the guide: Peptides for weight loss

  • Tissue healing + recovery

    Peptides studied for tissue repair, gut barrier, and inflammation. BPC-157, TB-500, GHK-Cu, KPV, and the stacking question the research community keeps returning to.

    Read the guide: Peptides for healing

  • Cognitive peptides

    Compounds with evidence for attention, mood, and neuroplasticity. Semax, selank, dihexa, cerebrolysin. Includes the where-the-data-runs-out caveats.

    Read the guide: Cognitive peptides

  • Longevity + metabolic

    Compounds in the longevity and metabolic-health corner of the catalog. NAD+, epitalon, DSIP, thymosin alpha-1, plus the regulatory framing each one currently sits in.

    Read the guide: Peptides for longevity

Each guide opens with a Key Takeaways box that summarizes the load-bearing claims in 3 to 5 bullets. The body always moves mechanism, evidence, dosing, then risk profile, and states FDA status plainly. Reviewer date and credentials sit in the byline of every post. If you are new to peptide research, start with What are peptides used for and What is peptide therapy before the deeper protocol guides.

Start with a guide

Each guide covers one goal or peptide class end to end and links out to the detailed posts behind it.

Latest articles

Amber glass vial of kisspeptin peptide solution beside a stainless steel syringe on a cool steel tray under soft directional light
Peptide guide

Kisspeptin Peptide: What Human Trials Show About HPG Axis

Kisspeptin peptide switches on the brain's reproductive axis. See what human trials actually show about LH timing, testosterone, and dosing limits.

October 17, 2026·23 min read
Macro photograph of a glass peptide vial and syringe on a stainless steel tray under cool laboratory light, researching LL-37 peptide.
Peptide guide

LL-37 Peptide: Evidence, Risks, and Unanswered Questions

LL-37 peptide kills bacteria by rupturing membranes, but human evidence stops at topical ulcer trials and one gene-therapy study, not injections.

October 17, 2026·19 min read
A single amber glass vial and stainless steel syringe on a dark slate counter under soft side light, researching peptides for inflammation
Comparison

Peptides for Inflammation: Mapping BPC-157, KPV, and Thymosins

Peptides for inflammation compared by mechanism and evidence stage: BPC-157, KPV, thymosin alpha-1, and thymosin beta-4, with FDA status and safety notes.

October 7, 2026·14 min read
Two identical unbranded injection pens side by side on a cream surface, illustrating that Mounjaro and Zepbound contain the same drug.
Comparison

Mounjaro vs Zepbound: Same Drug, Two Different FDA Labels

Mounjaro and Zepbound are the same drug, tirzepatide, at the same doses. The difference is the FDA label: diabetes for Mounjaro, weight loss for Zepbound.

October 1, 2026·9 min read
A single unmarked white tablet beside a short glass of water on a cream surface, representing oral semaglutide.
Comparison

Rybelsus for Weight Loss: Not Approved, and the Pill That Is

Rybelsus is not FDA-approved for weight loss and moves the scale only a little. The oral semaglutide approved for weight loss is the Wegovy pill at 25 mg.

October 1, 2026·8 min read
Three unmarked white tablets of increasing size in a row on a cream surface, the largest on a copper disc, representing the Wegovy pill dose steps.
Peptide guide

Wegovy Pill: How It Works, How to Take It, and Results

The Wegovy pill is semaglutide 25 mg taken daily, FDA-approved for weight loss in December 2025. How to take it, how well it works, and how it compares.

October 1, 2026·9 min read
Amber glass vial of 5-Amino-1MQ research powder on a dark slate bench beside a steel spatula, lit by soft cool window light
Peptide guide

5-Amino-1MQ Guide: What the NNMT Evidence Actually Shows

5-Amino-1MQ is sold for fat loss, but every published result is preclinical. Read the NNMT mechanism, the circulating dosing range, and its FDA status.

September 28, 2026·21 min read
Amber glass vials and a steel dumbbell on a slate bench in low morning light, a still life framing peptides for men.
Peptide guide

Peptides for Men: What Works by Goal and Evidence Stage

Men search peptides for seven goals: muscle, fat loss, libido, hormones, recovery, hair, longevity. Here is the FDA status and trial evidence behind each.

September 14, 2026·18 min read
Unbranded peptide vials and ampoules beside acrylic bar blocks and a folder of printed trial tables, for a guide to peptides for women
Peptide guide

Peptides for Women: What the Female Trial Data Shows

Most peptide trials enrolled mostly men. This guide sorts every compound by whether women were actually studied, from PT-141 and GLP-1s to BPC-157.

September 14, 2026·19 min read
Split diagram contrasting the HPG axis and the GH axis, with kisspeptin, gonadorelin, hCG, sermorelin and CJC-1295 marked at their entry points.
Comparison

Peptides for Testosterone: Which Axis Actually Works

Most peptides for testosterone act on the growth hormone axis and never touch LH. Here is which compounds have measured serum testosterone in men.

September 8, 2026·18 min read
Abstract editorial composition of several identical pale discs arranged in a grid with one marked differently, suggesting products that look alike.
Science

The Ozempic Pill: Five Semaglutides, Three Shared Doses

Ozempic tablets, Rybelsus and Wegovy tablets are all semaglutide, and three strengths appear on two different products. Here is which is which.

August 27, 2026·8 min read
Editorial still life of a single small tablet beside an unbranded injection pen on a pale surface, scale contrast, soft daylight.
Protocol

Wegovy Pill Dosage Chart: Why 25 mg Is Not a Misprint

The oral Wegovy ladder runs 1.5 to 25 mg daily; the standard injection ladder runs 0.25 to 2.4 mg weekly. Same molecule, different scale, often conflated.

August 26, 2026·11 min read

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