Verbatim response from Perplexity
Some do, but most “hair loss shampoos” and many “serums” only help a little—or not at all. The treatments with the best evidence for pattern hair loss are minoxidil and, for many men, finasteride; shampoos mainly help by keeping the scalp healthy and reducing breakage rather than truly regrowing hair.[4][6]
- Shampoos: Cleveland Clinic says shampoos do not treat the cause of hair loss, though moisturizing formulas and ingredients like ketoconazole may help scalp inflammation and reduce factors that worsen shedding.[2]
- Serums: Hair-loss serums generally cannot make lost hair grow back or speed up your natural growth rate, but they may improve the look of existing hair by moisturizing the scalp and making strands appear thicker.[1]
- Best-supported treatments: University Hospitals and WebMD both identify minoxidil as an effective over-the-counter option; it helps many people with androgenetic alopecia, but it must be used continuously to maintain results.[4][6]
- For men: Finasteride has strong evidence and can slow or stop male-pattern hair loss for many users, with some regrowth.[4][6]
- Supplements: Biotin is commonly marketed, but there is no good evidence it treats hair loss unless you actually have a deficiency.[4][6]
What this means in practice:
- If a shampoo or serum promises dramatic regrowth, that claim is usually marketing rather than strong science.[2][3]
- If your goal is to slow shedding, improve scalp condition, or reduce breakage, some shampoos and serums can help somewhat.[1][2][3]
- If your goal is real regrowth, look for treatments with clinical evidence—especially minoxidil; for many men, finasteride is another strong option.[4][6]
If you want, I can also give you a “what actually works” shopping shortlist by hair-loss type: female pattern thinning, male pattern baldness, postpartum shedding, or dandruff-related shedding.