July 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” Chitosan slows root hair growth and causes a buildup of callose at low concentrations, but at high concentrations, it only inhibits growth without callose buildup.
Cocor Bebek leaf extract may promote hair growth better than minoxidil at high concentrations.
January 2006 in “Xibei zhiwu xuebao” Norethindrone and levonorgestrel can enhance or inhibit root growth in Arabidopsis thaliana depending on the concentration.
June 2014 in “Toxicologie analytique et clinique/Annales de toxicologie analytique” Hair analysis can be unreliable due to external contamination and varying drug concentrations.
January 2008 in “วารสารการแพทย์และวิทยาศาสตร์สุขภาพ (Journal of Medicine and Health Sciences)” Clitorea ternatea and Citrus hystrix extracts can promote hair growth at certain concentrations.
November 2020 in “International journal of pharmaceutical compounding” A stable and simple finasteride suspension was developed that retains over 94.3% of its concentration for up to 90 days and doesn't significantly increase occupational exposure, but safety measures are still advised.
52 citations
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February 1985 in “Archives of Dermatology” Minoxidil absorbs poorly through skin, with low risk of side effects at 1-2% concentration.
36 citations
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February 2017 in “BMC Complementary and Alternative Medicine” Geranium sibiricum extract helps hair grow and is more effective than minoxidil but can be toxic in high concentrations.
19 citations
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November 1971 in “Clinica Chimica Acta” The document concludes that measuring γ-glutamyl transpeptidase activity is more accurate with a higher substrate concentration and using diluted acetic acid to stop the reaction.
12 citations
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July 1993 in “The journal of investigative dermatology/Journal of investigative dermatology” Certain sex hormones and antiandrogens can either slow down or speed up the growth of human hair follicle cells depending on their concentration.
4 citations
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April 2020 in “bioRxiv (Cold Spring Harbor Laboratory)” The skin has about 230,000 touch-sensitive nerve fibers, with high concentrations in the hands and face.
1 citations
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August 2017 in “British Journal of Dermatology” Sodium hypochlorite can effectively prevent and remove Staphylococcus aureus biofilms in atopic dermatitis at high enough concentrations.
October 2025 in “Journal of Biota” SCOBY kombucha gel speeds up wound healing, especially at 12% concentration.
December 2024 in “Majalah kedokteran Bandung/Majalah Kedokteran Bandung” Carrot seed oil thickens hair roots and tips, with 75% concentration being most effective.
October 2023 in “Jurnal Ilmu Kefarmasian Indonesia” Cinnamon essential oil and virgin coconut oil hair tonic promoted hair growth, with the highest concentration performing better than the positive control.
September 2022 in “KnE medicine” Argan oil in hair tonic increases hair growth and weight in mice, with the best results at 3% concentration.
Fragrant pandan leaf extract can inhibit dandruff-causing fungus, especially at higher concentrations.
Waru leaf creambath can speed up hair growth in rabbits, especially at 37.5% concentration.
September 2016 in “Medical Sains/Medical sains” Liquorice extract promotes hair growth in male rabbits, with 2.5% concentration being most effective.
June 2008 in “Dermatologic Surgery” Hydrogen peroxide may have both positive and negative effects on wound healing, and its safe concentration for hair transplant surgery is unclear.
July 1989 in “British Journal of Dermatology” Minoxidil helps increase hair growth and density in people with hair loss, with higher concentrations giving better results.
September 2010 in “Reactions Weekly” A woman was allergic to 5% minoxidil, with stronger reactions to higher concentrations.
47 citations
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September 2015 in “Journal of Drug Delivery Science and Technology” Nanoparticulate systems improve drug delivery by controlling release, protecting drugs, changing absorption and distribution, and concentrating drugs in targeted areas.
15 citations
,
November 2020 in “International Journal of Molecular Sciences” Multi-walled carbon nanotubes can enhance root hair growth in certain plants by affecting nitric oxide and ethylene pathways, but only at specific concentrations.
9 citations
,
August 2005 in “Experimental Dermatology” Modified pep7, named EPM peptide, effectively promotes hair growth at low concentrations and works well with minoxidil.
4 citations
,
July 2019 in “Journal of cosmetic dermatology” Both 0.01% and 0.03% bimatoprost safely improve eyebrow fullness, with a patient preference for the 0.03% concentration.
4 citations
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October 2017 in “International Journal of Applied Pharmaceutics” Licorice extract hair tonics are effective and safe for hair growth, except for mild eye irritation at the lowest concentration.
4 citations
,
January 1994 in “Yakugaku zasshi” EPC-K is stable except at very acidic pH or when exposed to sunlight, and it can decompose in low ethanol concentrations.
2 citations
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July 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” COVID-19 causes more taste, smell, hair, memory, and concentration issues than other respiratory infections.
2 citations
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November 2021 in “International Journal of Applied Pharmaceutics” The phytosome lotion made from Mangkokan leaf extract was more effective for hair growth than 2% minoxidil, especially at 30% concentration.