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82primary sources behind the reference

Peptide and GLP-1 reference

Peptides, GLP‑1s, and care—made easier to understand.

Check a dosage chart, work out a syringe draw, compare results, or find a clinic. Every medical number links to the label or study behind it.

82 original sources26 compounds with label or trial doseschecked 2026-08-20

Healthspan Access Network

Find care with details you can check

Search clinics by location or treatment, then compare services, visit types, published prices, care teams and license details. Booking stays on the clinic’s own website.

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cities
64
markets
184
profiles

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64 markets

  • Services offered
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36compounds, grouped by evidence

Reference library

Find a compound by the evidence behind it

Start with an FDA-approved dose, a dose studied in people, or a compound with no published human dose.

Search all 36 compounds →

The dose comes from an FDA-approved label

6 compounds

The dose comes from a published human trial

20 compounds

No published trial sets a dose

10 compounds

Start with what you are looking for

Explore peptides by goal

These are reasons people shop for peptides, not claims that every compound works. Each card shows how much of the category rests on reported use alone.

Peptides for weight loss: evidence behind the compounds
Peptides for weight loss: evidence behind the compounds: exact evidence counts
Evidence groupCompounds
FDA-approved3
Other human evidence9
Reported use only3
Most-read goalPeptides for weight lossSee how 15 peptides compare for weight loss. Find approved options, trial results, timelines, costs, access, and where the evidence stops.15 compounds3 based only on reported practiceExplore weight-loss evidence →Peptides for muscle growthSix peptides are sold for muscle gain. Four changed growth hormone in human studies, but none measured muscle size or strength. See the evidence.6 compounds2 based only on reported practicePeptides for skinSellers offer three peptides for skin. The one with the most research is a cream ingredient, and its blinded trial did no better than control.3 compounds2 based only on reported practicePeptides for healing and recoveryPeople buy four peptides to heal injuries faster. The two they buy most have the least human data, and FDA found no record of anyone taking one.4 compounds3 based only on reported practicePeptides for sleepSellers offer five peptides for sleep. Only one has a study that measured sleep itself, and that work dates from the 1980s and used a vein.5 compounds4 based only on reported practicePeptides for anxiety and depressionSelank has small studies in people with anxiety. None gives a dose. Semax and BPC-157 have no human result for anxiety or depression.2 compounds1 based only on reported practicePeptides for longevitySellers offer six peptides for longevity. The famous lifespan result came from another substance. No study here measured how long people live.6 compounds4 based only on reported practicePeptides for sexual functionPeople buy two peptides for libido and erections. One carries an FDA approval whose label rules out the group that buys it most.2 compounds0 based only on reported practicePeptides for immune supportSellers offer three peptides for immune support. The one with the best evidence has a 1,106-person trial behind it that found no survival gain.3 compounds1 based only on reported practicePeptides for testosteroneFour peptides on this site are sold for raising testosterone. Only one has ever been measured against it in people, and only into a vein.4 compounds3 based only on reported practice
32calculators built from the same math

Free tools

Start with the number you need

Every tool asks one question at a time, shows the answer clearly, and lets you check the math.

Browse all 32 calculators
Peptide calculatorTurn the label on a vial into syringe units.Enter the vial strength, water, dose, and syringe type. The calculator shows the draw and each step behind it.Vial10 mgWater2 mLDose1 mgExample draw20 unitsOpen the peptide calculator
Weight progressSee percent change, milestones, and a simple trend over time.Daily protein plannerSplit a protein goal across meals and keep a running total.Lean body massEstimate lean mass with several common formulas and compare the results.
Popular peptide calculatorsTirzepatideSemaglutideRetatrutideCagrilintideSurvodutideBPC-157
6comparisons with trial limits intact

Comparisons

Direct comparisons are clearly marked. When no head-to-head trial exists, each result stays separate instead of being used to pick a winner.

Browse all 6 comparisons →
Tirzepatide vs semaglutideSURMOUNT-5 head-to-headWegovy vs ZepboundSURMOUNT-5 head-to-headRetatrutide vs tirzepatideNo head-to-head trialSurvodutide vs tirzepatideNo head-to-head trialTesamorelin vs sermorelinNo head-to-head trialTesamorelin vs CJC-1295No head-to-head trial
3current briefs, each tied to a dated record

Research & current intelligence

What the data changes

Browse original research →

From the federal data

18%

of Mounjaro and Zepbound FDA reports

Dosing errors appear more often than nausea in these FDA reports.

The wrong amount going in accounts for 18% of Mounjaro reports and 18% of Zepbound reports. These are shares of reports, never rates of risk.

FDA side-effect reports · read 2026-08-17

Read the study and how we counted →

Latest policy change

Regulatory tracker

FDA has published no outcome from the July 2026 peptide review · 2026-08-15

See what changed →

Price & coverage

What these drugs cost

Compare list prices, savings-card limits, coverage details and what pharmacies report paying.

Compare current costs →

What we read, and when

last read 2026-08-17

Four federal databases, refreshed into this site on a schedule. Each row is the question we put to one of them and the day we put it.

Source freshness: the latest read from each federal feed
Source freshness: the latest read from each federal feed: exact source dates
SourceRead by HealthspanLedgerPublisher updated
Side-effect report database2026-08-172026-07-30
Drug Shortage Database2026-08-14Not stated
Enforcement (recall) reports2026-08-172026-08-05
National Average Drug Acquisition Cost2026-08-132026-08-12

  • Side-effect report databaseFDA

    Asked for every reaction reported against 31 GLP-1 and peptide products.

    31 products checked

    read 2026-08-17

    FDA updated 2026-07-30

    What the reports say

  • Drug Shortage DatabaseFDA

    Asked for whether semaglutide or tirzepatide is on the shortage list today.

    none of 2 listed

    read 2026-08-14

    Why the listing decides what is legal

  • Enforcement (recall) reportsFDA

    Asked for recalls naming any compound covered on this site.

    219 filings

    read 2026-08-17

    FDA updated 2026-08-05

    Who was recalled, and why

  • National Average Drug Acquisition CostCMS

    Asked for what pharmacies actually paid for 9 GLP-1 brands.

    46 weekly prices

    read 2026-08-13

    CMS updated 2026-08-12

    What these drugs cost

What HealthspanLedger covers

Compounds covered
36
With a dose from a label or a trial
26
Distinct primary sources cited
82
Information last checked
2026-08-20
4rules that keep the reference independent

How we source

Every number is stored with the document it came from. Most come from an FDA-approved label or a published human trial; a few come from smaller studies, and those say so. Where no study has established a dose, we publish that instead of a number.

The site does not build if a clinical value is missing its source. That is a check, not a promise.

The sourcing methodologyEditorial policy

What this site refuses to do

Most dosing information online exists to sell something. Four rules keep this site on the other side of that line, and each one costs us money.

  • We do not sell compounds. Nothing here is for sale.
  • We do not link gray-market vendors. No affiliate links, no sponsored placements, no “where to buy”.
  • We do not publish an uncited number. If a dose cannot be traced to a label or a published trial, it is not here. Where there is no evidence, that is the answer.
  • We do not compare results across separate trials. Two studies with different people and different endpoints cannot be put on one axis. If no trial compared them directly, that limit is stated clearly.

Compound guides carry the reviewer’s name and the date they were checked — what that covers is on the medical review page. Spotted an error? Email contact@healthspanledger.com.