February 2022 Plant roots respond to fungus smells by possibly using certain proteins and a plant hormone to change root growth, but more research is needed.
March 2017 in “bioRxiv (Cold Spring Harbor Laboratory)” Plant root hair growth is controlled by the hormone auxin, which affects the production of certain oxygen-related molecules through a specific process.
32 citations
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August 2018 in “FEBS letters” A specific protein complex increases the activity of a plant enzyme, but this action is not required for plant root hair growth.
13 citations
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March 2010 in “International Journal of Cosmetic Science” Hair coloring increases copper and calcium uptake, damaging hair and reducing shine.
29 citations
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December 1989 in “The journal of nutrition/The Journal of nutrition” Mice's intestinal uptake of pantothenic acid is not affected by dietary levels.
8 citations
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July 2012 in “Annals of biomedical engineering” Hair absorbs molecules differently based on their size, charge, and love for water, and less at higher pH; this can help make better hair products.
9 citations
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January 1989 in “Sen'i Gakkaishi” Wool and hair fibers absorb moisture similarly due to their keratin structure, with the amount of non-crystalline areas affecting the moisture uptake.
18 citations
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August 2014 in “International journal of pharmaceutics” Aging and sun damage do not increase the skin's absorption of certain sunscreens and drugs.
55 citations
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February 2010 in “Journal of Pharmaceutical Sciences” Minoxidil promotes hair growth by penetrating skin, with ethanol-containing formulas working best.
25 citations
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June 2011 in “International journal of pharmaceutics” Nanoparticles effectively deliver water-insoluble drugs to hair follicles, stimulating hair growth without irritating the skin.
93 citations
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June 2008 in “Atmospheric environment” Ozone reacts more with unwashed hair, producing compounds due to scalp oils, which could lower ozone exposure but increase exposure to reaction products.
11 citations
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January 2006 in “Drug development and industrial pharmacy” Adding TPGS to minoxidil solutions can improve skin penetration and retention, especially in water and PEG 400-based solutions.
November 2022 Water and fatty acids affect hair's surface differently based on hair damage, and models can help understand hair-cosmetic interactions.
February 2021 in “Journal of Pharmaceutical Sciences” Topical finasteride with EGCG or TA improves drug release and dermal uptake, potentially treating hair loss effectively.
39 citations
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November 2016 in “Pharmaceutics” The hair follicle pathway significantly affects how easily water-loving chemicals pass through the skin.
15 citations
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January 1992 in “Sen'i Gakkaishi” The Cell Membrane Complex in hair has both water-attracting and water-repelling layers.
9 citations
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June 2019 in “Journal of structural biology” Hair's internal fibers are arranged in a pattern that doesn't let much water in, and treatments like oils and heat change how much water hair can absorb.
October 2022 in “Journal of Kermanshah University of Medical Sciences” Different substances can affect how well the skin absorbs minoxidil, a hair loss drug. Caprylic acid helps the skin absorb it the best, followed by propylene glycol and water.
32 citations
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January 2019 in “Journal of pharmaceutical sciences” The model better predicts how water-loving and fat-loving substances move through the skin by including tiny pores and hair follicle paths.
156 citations
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November 2016 in “Journal of controlled release” Tight junctions are key for skin protection and controlling what gets absorbed or passes through the skin.
18 citations
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May 2015 in “Drug Development and Industrial Pharmacy” New gel formulas without ethanol and propylene glycol, containing a minoxidil-methyl-β-cyclodextrin complex, have been created for treating hair loss.
93 citations
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April 2003 in “Proceedings of the National Academy of Sciences of the United States of America” Fatty acid transport protein 4 is essential for skin and hair development.
43 citations
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August 2016 in “International Journal of Nanomedicine” Eupafolin nanoparticles help protect skin cells from damage caused by air pollution.
33 citations
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January 2008 in “International Journal of Pharmaceutics” The conclusion is that measuring how drugs partition into artificial sebum is important for predicting their delivery into hair and sebaceous follicles, and it provides better information than traditional methods.
32 citations
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February 2005 in “Journal of pharmaceutical sciences” Different tea tree oil mixtures absorb into hair follicles at varying levels, with microemulsion being the most effective.
27 citations
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October 2015 in “Neuropharmacology” Dutasteride protects dopamine neurons in Parkinson's mice, but Finasteride doesn't.
14 citations
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September 1954 in “Textile Research Journal” Hair absorbs different substances from solutions based on pH levels.
6 citations
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May 2020 in “Molecules/Molecules online/Molecules annual” Yak belly hair has higher porosity and is less stiff than human hair, making it absorb dye better but less suitable as a direct substitute for hair dyeing.
4 citations
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May 2021 Selenium can be toxic to animals, causing serious health issues, especially in horses.
January 2013 in “Food science and technology research” Green tea extract may increase copper levels in mouse hair without affecting liver copper.