The Use of Serenoa Repens (Saw Palmetto) in Hair Care Products

    Joanna Igielska Kalwat, Jung Yeob Ham, Jin Chul Kim
    TLDR Saw palmetto in hair products might reduce hair loss but can cause side effects.
    In 2019, a study explored the use of Serenoa Repens, or saw palmetto, in hair care products. Saw palmetto, a plant native to the Americas, has been used in traditional medicine since the 19th century. The extract from this plant inhibits 5-alpha-reductase (5-AR), an enzyme that converts testosterone into dihydrotestosterone (DHT). High DHT levels are linked to androgenic alopecia, a common form of hair loss in both genders. By reducing DHT levels, saw palmetto extract could potentially mitigate hair loss. This extract is found in various hair care products like shampoos, masks, and conditioners. However, the study also noted potential side effects such as dizziness, headache, nausea, vomiting, and reduced blood coagulation. It was not recommended for use during pregnancy and breastfeeding.
    View this study on →