December 2023 in “International Journal of Newgen Research in Pharmacy & Healthcare” Both herbal and synthetic shampoos in India are generally safe and effective.
October 2025 in “International Journal of Research and Review” Herbal shampoo bars are eco-friendly and beneficial for hair and scalp but need improvements for wider use.
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June 2001 in “International Journal of Cosmetic Science” Natural shampoos made in the lab conditioned hair better than commercial ones with chemicals.
June 2026 in “Zenodo (CERN European Organization for Nuclear Research)” Herbal shampoos clean and nourish hair safely using natural ingredients.
Soapnut shampoo cleans hair naturally, promotes growth, reduces dandruff, and is gentle on the scalp.