September 2025 in “Journal of Surfactants and Detergents” In this study, shampoos containing sodium lauroyl methylaminopropionate showed superior coacervate formation and lubrication on wet hair, outperforming other amino acid surfactants and suggesting potential for creating low-irritation, high-performance hair products.
May 2026 in “Repository of the University of Ljubljana (University of Ljubljana)” This study analyzed the composition and cost of 50 cosmetic body scrubs for keratosis pilaris, finding that chemical exfoliants with glycolic acid may reduce symptoms by enhancing skin shedding and reducing water loss, but further clinical studies are needed to confirm their effectiveness.
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August 2014 in “Pharmaceutical Development and Technology” In this study, the researchers reported that while both propylene glycol and sodium lauryl sulfate enhanced finasteride's skin deposition, ethanol was the only effective enhancer of finasteride's permeation through the skin.
This study concluded that a shampoo with 10% sodium lauryl sulfate showed the best physical properties among the tested formulas, aligning closely with the Indonesian National Standard.
Certain ingredients in personal care products, like formaldehyde, oxidative hair dyes, and sulfates, pose health risks and need careful review.