8 citations
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October 2014 in “Journal of analytical toxicology.” This study found that a single application of 'Lye' or 'No-Lye' chemical straighteners significantly reduced drug concentrations in hair samples from both drug-fortified standards and authentic drug users.
1 citations
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December 2015 in “Jurnal Online Universitas Gadjah Mada (Universitas Gadjah Mada)” This study found that a lotion containing 1% xanthan gum had the best physical stability for candlenut extract hair-restoring lotion, with no significant change in flavonoid content after storage.
February 2024 in “Trends in Sciences” This study examined the stability of two 5α-reductase inhibitors in Tectona grandis extracts, finding that they are more stable in acidic environments and degrade rapidly under heat and light unless protected, suggesting the need for careful storage when developing anti-hair loss medications.
December 2025 in “PubMed” In this study, researchers found that a propylene glycol-free and alcohol-reduced topical foam containing minoxidil and finasteride remained chemically, physically, and microbially stable for 180 days when stored properly at room temperature in light-resistant containers.
This study found that, compared to oxidative treatments, reductive perm-waving more severely impacts the intermediate filaments in European human hair, while both treatments alter denaturation kinetics in a first-order manner.