Recovery taking longer than it used to?

Nothing here builds muscle, and the growth-hormone-axis pens in the range have only early human data. For recovery, the Peptide Checkup usually lands on Wolverine (BPC-157 + TB-500) for tissue repair or NAD+ for cellular energy — both graded honestly, both with thin human data.

Start the 7-minute Checkup See the two pens

01 — Where the Checkup usually lands

2 pens are researched for muscle & recovery.

BPC-157 and TB-500 have extensive animal data on tendon and muscle repair and no human efficacy trials; NAD+ has limited controlled data by injection. The Checkup shows the grade before it shows the pen. Your answers decide — including whether to buy at all.

02 — What the Checkup checks

Four things it checks for muscle & recovery.

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.

01Whether recovery means tissue repair (Wolverine) or energy and fatigue (NAD+) — the two are matched differently
02Conditions that matter for repair peptides, including cancer history and active infection
03Interactions with hormones, corticosteroids and glucose-lowering medicines
04Anti-doping status — BPC-157 and TB-500 are prohibited in tested sport

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.

Muscle & recovery

Take the 7-minute Checkup for muscle & recovery.

Start the Checkup How it works

Not medical advice · Research-use labelling applies · 18+ only · It can say no

≈7 min

Start the Checkup