Applying conditioner in the middle of a perm process reduces hair damage.
January 2012 in “Jounal of The Korean Society of cosmetology” Applying conditioner mid-treatment reduces hair damage during perms.
January 2012 in “한국미용학회지” Applying conditioner in the middle of a perm process reduces hair damage the most.
The 16th-century mummy's hair was well-preserved due to a calcium coating.
research Hair
January 1983 in “Elsevier eBooks” Hair grows from living roots, is made of dead keratin, and goes through growth, rest, and shedding stages.
1 citations
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March 2022 in “IntechOpen eBooks” Collagen is crucial for health and treating certain diseases, and supplements can improve skin, nails, and hair conditions.
106 citations
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June 1990 in “Journal of Investigative Dermatology” 10 citations
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December 2001 in “PubMed” The conclusion is that substances can penetrate hair fibers through multiple pathways, including both the cell membrane complex and the non-keratinous parts.
22 citations
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April 2018 in “Pharmaceutics” New methods improve how well skin treatments work by helping drugs get through the skin barrier.
26 citations
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May 2012 in “Pharmaceutical Development and Technology” PEVs effectively deliver minoxidil through skin.
3 citations
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September 2005 in “International Journal of Cosmetic Science” Different oils penetrate hair differently; monounsaturated oils like olive oil penetrate better than polyunsaturated oils.
211 citations
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June 2012 The skin is a complex barrier for drug penetration, but understanding its structure and interactions can improve drug delivery methods.
December 2023 in “Biological & pharmaceutical bulletin” IPM enhances skin penetration of hydrophilic drugs.
74 citations
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June 2010 in “European Journal of Pharmaceutics and Biopharmaceutics” Minoxidil foam enters hair follicles and skin for hair growth.
29 citations
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September 2024 in “AAPS PharmSciTech” Transcutol® helps drugs penetrate the skin more effectively in various formulations.
15 citations
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June 2016 in “Computers in Biology and Medicine” Ascorbyl Tetraisopalmitate penetrates skin better in the stratum corneum than in the infundibulum.
21 citations
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July 2015 in “International Journal of Nanomedicine” Increased liposome fluidity boosts skin penetration of sodium fluorescein.
15 citations
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October 2020 in “European journal of pharmaceutics and biopharmaceutics” Caffeine penetrates skin quickly through open hair follicles, but less through closed ones, with levels becoming equal after 22 hours.
9 citations
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January 2023 in “Langmuir” Solubility in skin changes with hydration, affecting chemical absorption.
2 citations
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November 2025 in “Pharmaceutics” Moderately lipophilic dyes penetrate skin deeply, while highly hydrophobic or lipophilic dyes stay on the surface.
33 citations
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June 1995 in “Journal of Pharmaceutical Sciences” More ethanol increases minoxidil delivery, but too much lowers efficiency.
15 citations
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August 2020 in “Analytical chemistry” Hair lipids do not protect against humidity.
October 2022 in “Chinese Journal of Dermatology” Dry skin does not mean the skin's protective barrier is broken; it's often due to a lack of natural skin moisturizers.
67 citations
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January 2012 in “Biological and Pharmaceutical Bulletin” Nanoparticles don't penetrate intact skin but can enter through pores or damaged skin.
16 citations
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August 2014 in “Colloids and surfaces. B, Biointerfaces” Lipid-coated silica nanoparticles penetrate human skin more deeply than bare silica nanoparticles.
1 citations
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November 2004 in “International Journal of Cosmetic Science” External agents penetrate skin more easily in areas with fewer lipids, especially through hair follicles.
June 2024 in “International Journal of Cosmetic Science” Plant oils like coconut, camellia, and safflower can penetrate hair, making it stronger and softer.
54 citations
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October 2002 in “Journal of controlled release” Medium lipophilic substances penetrate skin best, and adding ethanol can increase delivery to hair follicles.
11 citations
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June 2001 in “PubMed” Coconut oil can penetrate hair better than mineral oil, potentially protecting against damage.