Educational research platform

Before you begin

Welcome to Peptide Relay

Explore source-linked research, practical tools, and Community Intelligence with evidence, interpretation, and personal experience kept clearly separated.

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Choose how you enter RelayYou can change your mind and create a workspace later.

No account is required for the Research Library, Learn, Compare, Stack Explorer, Community, or Tools. A free workspace is only required for private features such as My Relay, Protocol Tracker, saved work, following compounds, and managing Community Experiences.

Peptide Relay status

Public Alpha

v0.9.0

Building Relay with the community.

Relay is now feature-complete and has entered its first Public Alpha.

From this point forward, improvements are driven by real-world usage, community feedback, analytics, and research rather than internal feature planning.

Thank you for helping shape Relay.

What's NewWhat shipped in the current release
v0.9.0 — Public AlphaJuly 2026

Research Library

Thirty-five source-traceable compound and blend profiles with plain-English summaries, detailed science, evidence context, timelines, and references.

Learn

Peptide 101 and seven cornerstone guides for reading studies, mechanisms, evidence strength, personal experiences, and research uncertainty.

Compare

Side-by-side research context with shared, different, and unknown states—without inventing head-to-head conclusions.

Stack Explorer

Multi-compound pathway and evidence analysis with exact-combination limits and unanswered questions kept visible.

Community Experiences

Anonymous structured Experience Reports, separate story consent, verified follow-ups, moderation, and privacy-thresholded Community Intelligence.

Protocol Tracker

Private schedules, administrations, reflections, measurements, inventory, imports, lifecycle controls, and reconstitution support.

Reconstitution Hub

Single-compound and blend calculations, visual syringe and vial interpretation, reference marks, and private saved workspaces.

Relay-wide Search

One alias-aware search experience across public research and signed-in workspace destinations.

Mobile Optimization

Reliable touch selection, tighter information density, responsive tables and tabs, and mobile-first workflow refinement.

Motion System

One restrained motion language that explains state changes and respects reduced-motion preferences.

Platform Improvements

Database contract auditing, private-route indexing boundaries, public-route smoke tests, clearer recovery messages, and stronger protection against false-success writes.

RoadmapDirection without promised timelines

Roadmap items describe current direction. Public Alpha evidence may change their order or scope.

Now
  • Community growth
  • Bug fixes
  • UX improvements
  • Content expansion
Next
  • Relay+ features
  • Additional research tools
  • Expanded compound library
Future
  • Relay AI
  • Native iPhone app (planned)
  • Native Android app (planned)
Known IssuesMeaningful issues users may encounter
No known critical issues at this time.

Newly confirmed issues will appear here when they meaningfully affect the public experience.

FeedbackHelp improve the next release

Found a bug?Have a suggestion?

Submit feedback to help improve Relay
Version HistoryPublic releases and milestones
v0.9.0

Public Alpha

The first feature-complete public release candidate for Peptide Relay.

Released July 2026

Last updated July 2026 · Updated with every public release.

Simple first. Deeper when you want it.

Understand the differences that matter.

See the biggest similarities, differences, strengths, limitations, and unanswered questions first—then open the evidence behind them.

Compound comparison

Cagrilintide vs. Semaglutide

Understand the meaningful overlap, differences, evidence, and unknowns—then go deeper only when you want to.

60-Second Summary

The answer first

Deeper evidence stays available below
Why compare them?

Both are represented in Weight management research, making their overlapping mechanisms and evidence maturity useful to compare.

Current evidenceComparable evidence base

No direct head-to-head study is represented. This comparison uses separate evidence records that may differ in population, duration, route, dose, and endpoint.

✓ Shared

Shared Similarities

  • Both have been studied in Weight management.
  • Both have controlled human research, although the questions and designs may differ.
⇄ Different

Biggest Difference

Cagrilintide is distinguished by long-acting amylin analogue with amylin- and calcitonin-receptor activity; it is not a GLP-1 receptor agonist and is not the same evidence record as CagriSema; Semaglutide is distinguished by single GLP-1 receptor agonist with multiple approved injection and tablet products and mature outcomes evidence.

? Unknown

Biggest Unknown

No direct head-to-head study establishes how these compounds compare under the same population, dose, duration, and endpoints.

Key Takeaways

Cagrilintide is distinguished in the current record by long-acting amylin analogue with amylin- and calcitonin-receptor activity; it is not a GLP-1 receptor agonist and is not the same evidence record as CagriSema. Semaglutide is distinguished by single GLP-1 receptor agonist with multiple approved injection and tablet products and mature outcomes evidence. Neither is objectively “better”; the useful question is which evidence record addresses the research question being asked.

Research matrix

Which question has stronger current support?

Evidence support, not a “better compound” score
Research questionStronger current supportExplanation
Human evidenceSemaglutide

Cagrilintide: Developing human evidence. Semaglutide: Mature human evidence.

Regulatory historySemaglutide

Cagrilintide: Investigational — Phase 3. Semaglutide: FDA approved for defined product-specific indications.

Mechanistic breadthCagrilintide

More named targets describes mechanistic breadth; it does not establish greater effectiveness.

Direct comparisonUnknown

Separate studies cannot establish comparative superiority.

Deeper when you want it

Explore the evidence and nuance

Every section is optional
Best-studied areas and pathway mapSee shared targets, unique pathways, and the research questions attached to each record.
Best-studied research areas

Cagrilintide

  • Weight management
  • Appetite and energy intake
  • Obesity with type 2 diabetes
  • Visceral and ectopic fat
Best-studied research areas

Semaglutide

  • Weight management
  • Type 2 diabetes
  • Cardiovascular outcomes
  • Chronic kidney disease

Pathway and research map

Shared foundation and unique questions

Shared pathways
  • No shared named receptor target in the current records.
Cagrilintide only
  • AMY1R
  • AMY3R
  • CTR
Semaglutide only
  • GLP-1R
Shared research areas
  • Weight management
Cagrilintide distinctions
  • Appetite and energy intake
  • Obesity with type 2 diabetes
  • Visceral and ectopic fat
Semaglutide distinctions
  • Type 2 diabetes
  • Cardiovascular outcomes
  • Chronic kidney disease
  • MASH
Research confidence by questionCompare regulatory, human-evidence, outcome, and administration records side by side.

Question by question

What each evidence base can actually answer

Reviewed July 25, 2026
Regulatory statusEvidence, not a winner
CagrilintideInvestigational

Investigational. No FDA-approved standalone cagrilintide product, consumer dose, reconstitution method, or official storage procedure.

SemaglutideFDA-labeled indications

FDA approved in product-specific formulations for defined weight-management, type 2 diabetes, cardiovascular, kidney, and MASH indications.

Evidence depthEvidence, not a winner
CagrilintidePhase 2 + Phase 3 pending

One published 706-participant Phase 2 monotherapy trial, a 105-participant thorough-QT study, sponsor-reported Phase 3 component-arm data, and two active dedicated Phase 3 RENEW trials without posted results.

SemaglutideMature Phase 3 + outcomes

Multiple large Phase 3 programs and outcomes trials, including SELECT, FLOW, ESSENCE, STEP TEENS, and the higher-dose STEP UP program.

Weight outcomesEvidence, not a winner
CagrilintidePeer-reviewed Phase 2

Phase 2 reported mean reductions of 6.0% to 10.8% across studied cagrilintide arms versus 3.0% placebo at 26 weeks. A sponsor-reported Phase 3 component arm later reported 11.8% versus 2.3% at 68 weeks under an efficacy estimand.

SemaglutidePeer-reviewed Phase 3

STEP 1 reported −14.9% mean change at 68 weeks with 2.4 mg versus −2.4% placebo. STEP UP later reported −18.7% with 7.2 mg, −15.6% with 2.4 mg, and −3.9% with placebo at 72 weeks.

Type 2 diabetesEvidence, not a winner
CagrilintidePhase 3 registered

RENEW 2 is studying standalone cagrilintide in adults with overweight or obesity and type 2 diabetes; no results were posted by the cutoff.

SemaglutideApproved + extensive trials

Approved injection and oral products have extensive type 2 diabetes evidence. Product names, routes, strengths, and label instructions are not automatically interchangeable.

Obstructive sleep apnoeaEvidence, not a winner
CagrilintideNo dedicated evidence

No dedicated completed controlled human obstructive-sleep-apnoea outcome study was located.

SemaglutideNo approved indication

No FDA-approved semaglutide indication for obstructive sleep apnoea was identified in the current U.S. labels.

Cardiovascular outcomesEvidence, not a winner
CagrilintideQT study only

A 105-participant thorough-QT study found no clinically relevant QTc prolongation at the tested exposure. That narrow result is not a cardiovascular outcomes trial.

SemaglutideSELECT + labeled uses

SELECT demonstrated fewer major cardiovascular events in adults with established cardiovascular disease and overweight or obesity without diabetes. Other approved product labels cover defined diabetes populations.

Administration and handlingEvidence, not a winner
CagrilintideTrial descriptions only

Published and registered studies describe once-weekly subcutaneous administration under protocol-specific escalation. These are trial descriptions, not approved dosing instructions.

SemaglutideMultiple product-specific labels

Current FDA labels include weekly subcutaneous injections and daily oral tablets with product-specific administration, switching, and storage instructions. Approved products require no reconstitution.

Comparison limitationsUnderstand what this comparison cannot establish before interpreting separate studies.

Comparable evidence base

  • No direct head-to-head trial is represented for this pair.
  • Separate studies may use different populations, endpoints, durations, doses, routes, and estimands.
  • Results should not be interpreted as comparative superiority or individual guidance.

Current unknowns

Questions the evidence cannot answer yet

Cagrilintide
  • Whether the dedicated RENEW Phase 3 trials confirm long-term standalone efficacy and safety in people with and without type 2 diabetes.
Semaglutide
  • Long-term comparative outcomes across newer products and doses, rare events at population scale, and evidence outside studied populations or approved products.

Community Intelligence

Emerging patterns, clearly separated from evidence

Structured, approved self-reports only

Cagrilintide

No community experiences yetBe the first account holder to contribute.

Semaglutide

No community experiences yetBe the first account holder to contribute.

Community Intelligence summarizes structured, self-reported experiences. It can reveal patterns and useful research questions, but it cannot prove safety, effectiveness, or cause and effect. Published evidence is always shown separately.