Compound library / Skin, hair & topicals / Hair Loss
Oral 5-alpha-reductase type II inhibitor that lowers DHT, FDA-approved for male pattern hair loss.
| Category | Hair Loss |
|---|---|
| Regulatory standing | Approved medicine |
| Typical route | Oral |
| Half-life | ~5-6 hours |
| Common dose range | 1 mg/day (hair loss dose; 5 mg/day is the BPH dose) |
| Typical cycle length | Ongoing — benefits reverse within months of stopping |
BioHack Track models Finasteride (Propecia) at a half-life of 5.5 hours, so every dose you log is decayed against that curve and the app shows estimated active levels — not just what you typed.
An FDA-approved product containing this compound exists, and its label is linked under Primary sources below. That label is the authority on dosing; the range on this page describes what people commonly track, including off-label use, and does not replace it.
Oral tablet; no reconstitution needed. Topical/oral compounded versions also exist.
Store at room temperature.
Prescription medication. Small risk of sexual side effects (some persisting after discontinuation in rare reports — "post-finasteride syndrome" is debated); not for use by women who are or may become pregnant.
Track Finasteride (Propecia) in BioHack Track. Half-life, dose range and route come pre-filled from this library — log a dose and the app counts your vial down, models what is in your system, and puts it on the same chart as your labs and body composition.
Evidence Check asks 10 questions about every compound. For Finasteride (Propecia) it can answer 1 of them, from the papers we hold — graded by how strong the study design is, not by whether the findings are flattering. These are the same verdicts the app gives.
Meta-analyses or systematic reviews exist — the highest grade of evidence there is, whatever they conclude. Read them.
Research references only. Not medical advice, and not a recommendation to take anything.
These open a search of each database for Finasteride (Propecia) — they are not citations, and nothing here is evidence for any particular dose. The same links are in the app.
11 papers naming Finasteride (Propecia) in the title, drawn from PubMed and limited to reviews, meta-analyses and trials. Each was checked against PubMed’s own record for its title, journal and year. This is a starting point, not an evidence review — nothing here is offered as support for the dose range above, and the list is not exhaustive. See the editorial policy.
Primary sources for Finasteride (Propecia)
The half-life, route and dose range on this page are compiled from published pharmacokinetic literature, manufacturer and product monographs where one exists, and the ranges commonly reported in clinical and research use. They are kept as a range rather than a single figure because that is what the sources actually support — a half-life varies with route, formulation and the person.
These are not citations, and this page is not a review of the evidence. Where a number matters to you, follow the database links above and read the source. We say so plainly rather than dressing a compiled reference up as one.
Nothing on this page has been reviewed by a named clinician. It is a reference for people already tracking a protocol, not a recommendation to start one.
General reference compiled for use inside the app, not medical advice and not a recommendation to take anything. Dose ranges are what is commonly discussed, not a prescription. Talk to a qualified healthcare professional.