January 2013 in “프로그램북(구 초록집)” Hair perms or treatments seem safe to use up to 3 to 4 times during pregnancy.
25 citations
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May 2020 in “Progress in Organic Coatings” Castor oil-based polyurethanes are promising for making safe, strong-performing, eco-friendly hair-styling products.
7 citations
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May 2021 in “Applied sciences” Proteins like BSA and keratin can effectively style hair and protect it, offering eco-friendly alternatives to chemical products.
November 2025 in “Zenodo (CERN European Organization for Nuclear Research)” Herbal hair gels are safer and effective alternatives to synthetic gels, promoting hair health.
November 2025 in “Zenodo (CERN European Organization for Nuclear Research)” Natural hair gels with herbal extracts like Aloe vera and hibiscus are safer and effective for hair health.