Goal · Fat loss / body composition
≈7 min · no account
Usually lands on · Tesamorelin / Tirzepatide
Can end at no pen
Training hard but not seeing the change?
Body-composition claims are everywhere; controlled human data is rare. Tesamorelin has it — for visceral fat in a defined population — and tirzepatide has it for weight, with fat mass measured in a sub-study. The Peptide Checkup separates what the trials showed from what the adverts say, then checks your own history against it.
01 — Where the Checkup usually lands
2 pens are researched for fat loss / body composition.
Both compounds have controlled human evidence, for different measures: Tesamorelin for visceral fat in a specific population, tirzepatide for weight — with fat mass measured in a sub-study and graded lower. Both are authorised medicines elsewhere; the pens are research products, not those medicines. Your answers decide — including whether to buy at all.
- Tesamorelin20 mg / 3 mLStubborn abdominal fat and body composition — the compound with the strongest human evidence in the range.£255Details
- Illustration — photo to followTirzepatide30 mg / 3 mLWeight management where the dual GIP/GLP-1 agonist with the largest weight reductions in trials is the interest.£320Details
02 — What the Checkup checks
Four things it checks for fat loss / body composition.
7 minutes of structured questions — categories, not essays — run through a deterministic rules engine against the evidence and regulatory database, then scored against the range.
- 01What the Tesamorelin trials measured — visceral fat by CT in a defined population — against what the tirzepatide trials measured, and how each maps onto your goal
- 02Whether your timeframe is realistic against the trial durations
- 03Medical history and medicines that change suitability, including hormonal, thyroid and metabolic conditions
- 04Anti-doping status if you compete — Tesamorelin is prohibited — and the regulatory position of each pen
Research-use pens
Sold for research use only. Not a medicine and not authorised for human consumption. Purchasers must be 18+ and confirm intended use at checkout.
Peptide Checkup
The Peptide Checkup provides educational information and a structured summary of published research and regulatory status. It is not medical advice, does not diagnose or treat any condition, and does not replace a consultation with a qualified healthcare professional.
Fat loss / body composition
Take the 7-minute Checkup for fat loss / body composition.
Not medical advice · Research-use labelling applies · 18+ only · It can say no
≈7 min
Start the Checkup