What it is
Regulatory status: Nonprescription topical minoxidil products are FDA-regulated for labelled pattern-hair-loss populations and scalp areas; labels differ by concentration and sex.
Mechanism evidence: human
At a glance
What it is, why people use it, the evidence, and what to know before trying it.
Why people use it
- Hair regrowth in androgenetic alopecia
- Slowing visible progression of pattern hair loss
Evidence at a glance
Topical minoxidil has randomized-trial and regulatory support for androgenetic alopecia and is one of the best-established non-surgical options. It is not equivalent to oral minoxidil, and Bryan Johnson's reported nightly use is not the same as every product's labelled schedule.
Confidence: strong
Clinical safety
Contraindications, interactions and clinical cautions from reviewed sources.
Common effects include scalp irritation, dryness and unwanted facial or body hair; temporary early shedding can occur. Stop and seek care for chest pain, faintness, rapid heartbeat, swelling or unexplained weight gain. Keep away from children and pets because minoxidil is highly toxic to cats, and avoid broken skin or unlabelled application sites.
Forms and variants
This review does not automatically apply to:
- oral minoxidil
- compounded minoxidil combinations
- other topical hair-growth drugs
Seen in protocols
Public protocols that include Topical minoxidil. Open one to see the full context and source.