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Peptide Spencer

how this works

Our method

Every dose on this site is tied to a source you can open. Here is what the tags mean, where the sources come from, and how each guide is checked.

These dosages are a helpful guide, not a prescription. Every clinician is expected to do their own due diligence before prescribing.

Evidence tiers

Every guide carries one tier, shown as a seal. It describes the strongest evidence that exists for the compound, not how well a dose is supported.

  • FDA-approved product

    An approved label exists for this molecule. Compounded versions are not FDA-approved.

  • Controlled human trials

    Randomized or controlled human studies exist.

  • Limited human data

    Open-label, pilot, pharmacokinetic, or case-level human data only.

  • Preclinical only

    Animal or cell data only. No established human dose.

Layer tags

Each figure carries a tag for the kind of source behind it. Headline doses, the ones in the at-a-glance card and the index, use only the first three, and clinic and community figures stay in their own section.

  • Approved label

    Taken from an FDA-approved label.

  • Human study

    Taken from a published human study.

  • Clinical practice

    Reported in a peer-reviewed review, guideline, or textbook of clinical practice.

  • Clinic-reported

    Published by a clinic, pharmacy, or professional-education site. Shown only in the published-ranges section.

  • Community-reported

    Published by a vendor or community guide. Shown only in the published-ranges section.

Sources

Sources are FDA-approved labels, PubMed records, regulator pages, and public clinical-practice pages. Vendor and community guides also appear. Anything taken from them is labeled Community-reported, wherever it shows up. PubMed records show their DOI link and are marked "According to PubMed".

How each guide was built

  1. 1Drafted from sources. Each guide starts from public labels, PubMed records, regulator pages, and public clinical-practice pages.
  2. 2Every figure audited against its source. A figure that cannot be matched to its source text is corrected or removed.
  3. 3A separate safety review. A second pass reads the draft for warnings, contraindications, and unit mix-ups.
  4. 4A cross-compound check of the highest-risk doses, so a figure that is safe for one compound is not carried to another.
  5. 5Editorial cleanup that cannot change a number. The wording is tightened; the figures are checked again afterward.

Review and corrections

32 guides, last reviewed 2026-10-14. 1126 figures were checked against their sources.

Spotted an error? Email Spencer and say which guide and figure.

Disclosure

Peptide Spencer is run by Spencer Johnson, a sales representative for a licensed 503A compounding pharmacy that supplies the products listed here.