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Beginner guides All guides What are peptides?Legal status in the USPeptides banned in sportPharma vs compounded vs researchHow to read a COAReconstitution and storageMembersThe complete GLP-1 guideSide effects and red flagsHow to read peptide research
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Eight guides, in the order they make sense

Start with what peptides are and how to judge a study. Then the safety guides: legal status, where products come from, how to read a lab certificate and which symptoms need a doctor. The advanced guides cover handling freeze-dried peptides and the GLP-1 drugs in depth.

See the reading path Or start from a question

Start here, then safety, then advanced

Each stage builds on the one before it. Tap any guide to open it.

Stage 1

Start here

What peptides are, and how to judge the evidence behind any claim you read about one.

  1. 01 What are peptides? Amino-acid chains, how they differ from proteins and drugs, and why most are injected.
    • Peptide vs protein vs small molecule
    • How a peptide switches on a receptor
    • Why the gut destroys most of them
    Read the guide
  2. 09 How to read peptide research Rat studies, open-label trials and RCTs, and how much weight each one carries.
    • The study-type ladder
    • Why rat results rarely carry over
    • Rate real peptide claims yourself
    Read the guide
Stage 2

Safety

Where peptides come from, which ones are legal, how to check a lab report and which symptoms need a doctor.

  1. 02 Legal status in the US FDA approval, compounding lists, research-use-only labels and WADA rules.
    • FDA-approved, 503A, 503B, Category 2
    • What "research use only" means legally
    • What WADA bans in 2026
    Read the guide
  2. 04 Pharma vs compounded vs research Three supply chains, three levels of quality control.
    • Eight quality checkpoints compared
    • What testing of unregulated products found
    • Questions to ask a pharmacist
    Read the guide
  3. 05 How to read a COA Purity, mass spec, endotoxin and what a certificate cannot tell you.
    • An annotated sample certificate
    • HPLC purity vs net peptide content
    • Red flags on weak certificates
    Read the guide
  4. 08 Side effects and red flags Which symptoms are expected and which mean stop and call a doctor.
    • Expected side effects by peptide class
    • Signs of infection or pancreatitis
    • A symptom lookup that routes to care
    Read the guide
Stage 3

Advanced

The handling science of freeze-dried peptides, and the full GLP-1 story trial by trial.

  1. 06 Reconstitution and storageMembers Bacteriostatic water, fridge vs freezer, and how fast peptides degrade.
    • Bacteriostatic vs sterile water
    • Fridge, freezer, light and time
    • A worked mixing example
    Read the guide
  2. 07 The complete GLP-1 guide Semaglutide, tirzepatide and what comes next, trial by trial.
    • Every approved GLP-1 drug and label
    • Weight-loss results by trial
    • Muscle loss, stopping and regain
    Read the guide
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New trials, FDA changes and side-effect reports, written in plain English. Every result says whether it was tested in people or in animals.

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Which guide answers what you are asking

Tap the question closest to yours.

Answered in Legal status in the US FDA approval, compounding lists, research-use-only labels and WADA rules. Open the guide

Calculators the guides refer to

Reconstitution calculatorMembers Works out the concentration of a mixed vial, step by step. Measurement converterMembers Reads a volume mark as a volume and an amount, with the math shown. Half-life visualizer How long a single dose stays in circulation. Compare peptides Two or three peptides side by side on evidence and status. Peptide finder Filter by goal, evidence and legal status to a short list. GLP-1 titration viewerMembers The label escalation schedules for semaglutide and tirzepatide.
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Peptide research, regulatory changes and trial readouts, checked against the source. Daily and free, in plain English.
Frequently asked questions
Where should I start if I am new to peptides?
Read "What are peptides?" first, then "How to read peptide research." Together they explain what these molecules are and how much weight to give the studies quoted about them. The safety guides make more sense after that.
Do the guides give dosing instructions?
No. The guides explain how peptides work, how they are regulated and how they are handled. Doses studied in published trials and on approved labels are listed on individual peptide pages for free members, with sources, and are not recommendations.
How often are the guides updated?
Each guide shows the date it was last reviewed. Regulatory pages such as legal status are rechecked when the FDA or WADA publishes a change, and the daily peptide brief reports those changes when they happen.

This is educational information, not medical advice. Talk to a qualified healthcare professional before changing your treatment, medication, or supplement routine, especially if you are pregnant, nursing, or managing a health condition.