Rule out the root cause

Make sure it is actually male pattern baldness before treating it like it is.

Strong evidenceNo prescription

The cheapest legitimate way

Ask your primary care doctor or a dermatologist for ferritin, TSH, vitamin D, and a CBC. Many insurance plans cover it.

Smart path$0–$60 with insurance or a cash lab

Prices are estimates based on typical US cash prices. They change often, so check before you buy.

Evidence: Strong. Backed by large, well-designed studies.
How it works: Some hair loss comes from fixable causes: low iron, thyroid problems, low vitamin D, scalp conditions, stress shedding, or medications. A doctor visit and basic bloodwork can catch these.
What results look like: If the cause is fixable, hair often recovers once it is treated.
Time to results: Bloodwork results in days. Regrowth from fixed causes in 3–6 months.
Side effects and downsides: None
Best for: Everyone, and especially anyone with sudden shedding, patches, or scalp symptoms.
Sources: American Academy of Dermatology: Hair loss causes
AAFP: Diagnosing and treating hair loss

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