INGREDIENT GUIDE · 1 OF 5
Saw palmetto for hair: what it is, what the evidence shows, and why it anchors Afghani Oil
Short answer: saw palmetto is the berry extract with the most clinical studies of any botanical used for hair, mostly as an oral supplement and increasingly as a topical. A 2020 systematic review of seven studies found consistent, modest improvements; a 2023 trial included a topical arm. The data are promising but not robust, and oral supplements have their own safety notes. In Afghani Oil, saw palmetto is the first-listed botanical.
What saw palmetto is
Saw palmetto (Serenoa repens) is a small palm native to the south-eastern United States. The extract comes from its ripe berries and is rich in fatty acids and phytosterols such as beta-sitosterol. It is best known as a supplement studied for prostate symptoms, and that is also why it attracted hair researchers: the same compounds are thought to inhibit 5-alpha-reductase, the enzyme that converts testosterone to DHT.
Why people search for it
Searchers want to know what saw palmetto is, whether it helps hair, whether it is safe for women, and whether it works on the scalp or only as a pill. The honest answers depend on which form you mean.
What the research actually shows
Systematic review · In 2020, Evron and colleagues reviewed five randomised trials and two cohort studies of supplements containing saw palmetto (100–320 mg, oral and topical) in androgenetic alopecia and telogen effluvium. They reported a 60% improvement in overall hair quality, a 27% improvement in total hair count, increased density in 83% of patients and stabilised progression in 52%, with no serious adverse events. Their own caveat: robust, high-quality data are lacking.
Randomized trial with a topical arm · In 2023, an Indian four-arm trial gave 80 men and women either 400 mg oral capsules of a standardised saw palmetto oil, a 20% topical formulation, or placebos, for 16 weeks. Hair fall fell by 29% with the oral form and 22% with the topical; hair density rose by about 5% and 8% respectively; the anagen-to-telogen ratio did not change significantly. The study was funded by the extract’s manufacturer.
Limits · Trials are small, short and heterogeneous, and several are industry-funded. “Modest and consistent” is the fair summary; “proven” is not.
Known, safety · Oral saw palmetto is generally well tolerated, but a 2026 case series described sexual and psychiatric side effects after oral use in some people. Those reports concern supplements taken by mouth; a scalp oil delivers far less, but anyone with a hormone-sensitive condition, and anyone pregnant or breastfeeding, should ask a doctor before using products built around it.
How saw palmetto is used on hair
- As an oral supplement: capsules of 100–400 mg in the studies above. That is a medical decision, not a cosmetic one.
- As a topical: serums and oils containing the extract, massaged into the scalp.
- In Afghani Oil: ripe-berry extract anchors the five-botanical blend. Apply a measured amount at the parting with the dropper and follow the directions supplied with the bottle, as in how to use Afghani Oil.
How it fits with the other four botanicals
Saw palmetto is the botanical with the antiandrogenic research. Rosemary brings the strongest single topical trial, pumpkin seed lightness and its own oral trial, black seed the traditional scalp use, amla the shine and laboratory results. The ingredients guide lists all five.
Common questions
Is saw palmetto good for women’s hair? The 2023 trial included women and the 2020 review covered mixed populations. Because of its hormonal mechanism, women who are pregnant, breastfeeding or on hormone therapy should ask a doctor about oral use.
Does saw palmetto work on the scalp or only as a pill? Both forms have been studied; the topical arm in 2023 reduced hair fall by about 22%. The evidence for either is modest.
Does saw palmetto regrow hair? The studies measured hair count and density changes in people with diagnosed hair loss; no product on this site is sold as a treatment for hair loss. See a dermatologist for a diagnosis.
Where saw palmetto sits in Afghani Oil
Saw palmetto is the first of the five botanicals printed on the label of the Original Afghani Oil, 50 ml: ripe-berry extract, included because it is the most-studied botanical in the formula.
Sources
- Evron E, Juhasz M, Babadjouni A, Mesinkovska NA. Natural hair supplement: friend or foe? Saw palmetto, a systematic review in alopecia. Skin Appendage Disord. 2020;6(6):329-337. PMID 33313047.
- Sudeep HV, et al. Oral and topical administration of a standardized saw palmetto oil reduces hair fall and improves the hair growth in androgenetic alopecia subjects: a 16-week randomized, placebo-controlled study. Clin Cosmet Investig Dermatol. 2023;16:3251-3266. PMID 38021422.
- Can we identify a post-Serenoa syndrome? A case series on sexual and psychiatric side effects of Serenoa repens. Br J Clin Pharmacol. 2026. PMID 41507085.
- Beyond minoxidil: off-label therapies for male androgenetic alopecia, a systematic review with network meta-analyses. Medicina (Kaunas). 2026. PMID 42512824.