If your hair is thinning, the useful first move is not buying every supplement. It is identifying the pattern, documenting it, starting proven treatment when appropriate, and escalating quickly when the pattern looks inflammatory or scarring.
Hair loss is a symptom, not a diagnosis. Common pattern hair loss usually means follicles are miniaturizing over time. Diffuse shedding often means the body is reacting to a trigger such as illness, stress, postpartum changes, weight loss, iron deficiency, thyroid disease, medication changes, or under-fueling. Patchy, painful, inflamed, or scarring loss is different: delay can permanently damage follicles.
Use this guide as the action layer. For the detailed treatment reference, read Reversing Hair Loss.
| What you see | Most likely bucket | First move |
|---|---|---|
| Receding temples, crown thinning, widening part | Pattern hair loss | Photograph, consider minoxidil, and discuss androgen-directed options if appropriate.[1] |
| Sudden diffuse shedding | Telogen effluvium or trigger-related shedding | Look back 2-4 months for illness, stress, diet change, medication, pregnancy, or labs that need checking.[2] |
| Round patches | Alopecia areata or inflammatory loss | Dermatology evaluation. Do not treat it as simple pattern loss. |
| Pain, scale, redness, pustules, shiny scarred patches | Possible scarring alopecia or infection | Urgent dermatology evaluation. Follicles can be permanently lost. |
| Intervention | Evidence | What to do | Notes |
|---|---|---|---|
| Minoxidil | High for pattern hair loss | Use consistently and judge at 6-12 months, not 6 weeks. | Topical minoxidil is a first-line option for male and female pattern hair loss.[1:1] |
| Finasteride or dutasteride | High for many men with androgenetic loss | Discuss oral or topical options, side effects, fertility plans, and monitoring with a clinician. | Androgen-directed treatment targets DHT-driven miniaturization.[1:2] |
| Scalp inflammation control | Moderate | Treat dandruff, itching, or seborrheic dermatitis instead of ignoring it. | Inflammation can worsen shedding and reduce tolerance of topical treatments.[2:1] |
| Deficiency correction | Moderate when deficient | Check ferritin, thyroid markers, vitamin D, zinc, and diet quality when shedding is diffuse or unexplained. | Supplements help most when a real deficiency is present.[2:2] |
| PRP, microneedling, red light therapy | Moderate add-on evidence | Consider after the core diagnosis and maintenance plan are in place. | Add-ons work best as adjuncts, not substitutes for a correct diagnosis.[3] |
Do not start finasteride, dutasteride, spironolactone, oral minoxidil, or pregnancy-relevant hair-loss medicines without clinician guidance. Seek care quickly for scarring signs, sudden patchy loss, scalp pain, pustules, heavy shedding after a major illness, or hair loss with fatigue, weight change, menstrual change, or symptoms of anemia or thyroid disease.
Most hair interventions need months. Photos at baseline, 3 months, 6 months, and 12 months are more useful than daily mirror checks.
They are most useful when they correct a real deficiency. Random high-dose hair vitamins can distract from the diagnosis and may interfere with lab tests.
Usually no. First stabilize the biology. Transplants move hair; they do not stop future miniaturization.
Start with Reversing Hair Loss, then compare add-ons such as red light therapy for skin and hair, microneedling, and PRP.
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Nestor MS, Ablon G, Gade A, Han H, Fischer DL. Treatment options for androgenetic alopecia: efficacy, side effects, compliance, financial considerations, and ethics. Journal of Cosmetic Dermatology. 2021. https://pubmed.ncbi.nlm.nih.gov/34741573/ ↩︎ ↩︎ ↩︎
American Academy of Dermatology. Hair Loss Resource Center. https://www.aad.org/public/diseases/hair-loss ↩︎ ↩︎ ↩︎
Gupta AK, Bamimore MA, Foley KA. Efficacy of non-surgical treatments for androgenetic alopecia in men and women: a systematic review with network meta-analyses, and an assessment of evidence quality. Journal of Dermatological Treatment. 2022. https://pubmed.ncbi.nlm.nih.gov/32250713/ ↩︎