51+
Research Peptides
12
Curated Stacks
668+
Peer-Reviewed Studies
99%
COA Purity Threshold
§ Research Goals

What are you
optimizing for?

🏋️

Body Recomposition

Optimize fat loss while building lean muscle

→
🩹

Injury Recovery

Accelerate healing of injuries and surgeries

→
🧠

Mental Clarity / Focus

Enhance cognitive function and neuroprotection

→
🔥

Fat Loss

Targeted fat reduction and metabolic boost

→
💪

Muscle Growth

Maximize lean mass and strength gains

→
🛡️

Immune Support

Strengthen and balance immune function

→
🌙

Sleep / Recovery

Optimize sleep quality and overnight recovery

→
⏳

Longevity / Anti-Aging

Target fundamental aging mechanisms

→
✨

Skin & Aesthetics

Rejuvenate skin, hair, and appearance

→
🫁

Gut Health

Repair and protect the GI tract

→
⚡

Hormonal Optimization

Support healthy hormone levels naturally

→
🔬

Metabolic Health

Improve insulin sensitivity and energy

→
§ Tools

Research
tools.

Free interactive tools for peptide research, dosing, and comparison.

POPULAR

Cycle Planner

Plan your full cycle — vial counts, dosing schedules, and vendor sourcing.

Evidence Dashboard

51 peptides ranked by strength of clinical evidence with study counts.

Peptide Comparison

Compare 2–3 peptides side-by-side across mechanisms, dosing, and safety.

Price Comparison

Cross-vendor pricing: cost per vial, per dose, and PEPTIDEX discount math.

Reconstitution Calculator

BAC water volumes, concentration math, and syringe-unit conversions.

COA Analyzer

Verify any Certificate of Analysis — MW and purity checked against lab refs.

Interaction Checker

Check synergies, cautions, and contraindications between your selections.

PK Plasma Curves

Visualize pharmacokinetic plasma concentration curves and half-life decay.

View all tools
§ Verified Sourcing

COA-verified
vendors

Every vendor in our index is independently verified with third-party Certificates of Analysis. We test purity via HPLC and Mass Spectrometry before any recommendation.

Editor's Choice

Amino Club

★ 4.9(400+)
99%+ purity verified
🏷Use code PEPTIDEX for 20% off
  • COABatch-specific COA
  • TestingHPLC, Mass Spec, Endotoxin
  • Shipping2–4 business days (US)
  • Catalog40+ compounds
  • Returns60-day money-back guarantee
Shop Amino Club
Triple-Tested

Bio Longevity Labs

★ 4.8(350+)
99%+ purity verified
🏷Use code PEPTIDEX for 15% off — stacks with sales
  • COABatch-specific COA
  • TestingHPLC, LC-MS, Endotoxin
  • Shipping2–5 business days (US)
  • Catalog80+ compounds
  • Returns30-day money-back guarantee
Shop Bio Longevity Labs
USA Made

Limitless Life

★ 4.8(300+)
99%+ purity verified
🏷Use code PEPTIDEX for 15% off
  • COABatch-specific COA
  • TestingHPLC, LC-MS, Endotoxin
  • Shipping3–5 business days (US)
  • Catalog90+ compounds
  • ReturnsSatisfaction guarantee
Shop Limitless Life
COA Verified

Ascension Peptides

★ 4.7(250+)
98%+ purity verified
🏷Use code PEPTIDEX for 50% off
  • COACOA available
  • TestingHPLC, Mass Spec
  • Shipping3–5 business days (US)
  • Catalog60+ compounds
  • Returns30-day return policy
Shop Ascension Peptides
Compare all 6 places to buy peptides