Verbatim response from Perplexity
Hair growth supplements sometimes help, but mainly when hair loss is tied to a specific nutrient deficiency or a product with some clinical evidence; they do not reliably replace prescription treatment for common causes like pattern hair loss.[2][3][8]
If you’re asking whether they “actually work,” the evidence is mixed:
- Biotin is widely marketed but has little to no evidence for hair growth in people without a deficiency.[3][5][6][8]
- Iron and vitamin D can help when tests show you’re deficient, and vitamin C can support iron absorption.[3][8]
- Some branded supplements like Viviscal have shown benefit in clinical studies for certain women with thinning hair, and Nutrafol has published studies too, but these products do not work for everyone and the evidence is not as strong as for prescription therapies.[1][5][7]
For prescription or medical treatment, the best-supported options are usually:
- Minoxidil: the main over-the-counter drug that can promote regrowth and slow thinning; WebMD notes it works for about 2 out of 3 men and is the only OTC hair-loss medication FDA-approved for both men and women.[6]
- Finasteride: a prescription option for men that slows or stops hair loss in nearly 90% of users and regrows some hair in about two-thirds.[6]
A practical rule: if your hair loss is from genetics/pattern baldness, supplements alone are usually not enough; if it’s from nutritional deficiency, stress, illness, or temporary shedding, supplements may help if the underlying issue is corrected.[2][3][8]
The most useful next step is usually a dermatologist evaluation to identify the type of hair loss and decide whether you need labs, supplements, minoxidil, finasteride, or another prescription plan.[2][4][8]
If you want, I can also help you sort this by male vs. female hair loss or compare supplements vs. minoxidil vs. finasteride.