September 2024 in “Journal of the American Academy of Dermatology” Generic topical and transdermal systems usually cause minimal irritation or sensitization.
May 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This review highlights the therapeutic potential of Ziziphus mauritiana and Black Seed Oil in herbal hair care products, reporting their antioxidant, antimicrobial, and anti-inflammatory properties, which may help address issues like hair fall and scalp irritation while serving as promising natural alternatives to synthetic solutions.
May 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This review concludes that herbal formulations containing Ziziphus mauritiana and Black Seed Oil may offer a promising natural alternative for managing hair-related issues like dandruff, hair fall, and scalp irritation.
January 2025 in “International Journal of Herbal Medicine” This review highlights that while dandruff affects over 50% of humans and cannot be fully eradicated, it can be controlled through chemical treatments that may cause side effects or herbal remedies such as Neem and Tea tree oil, which have longstanding use in hair care.
October 2025 in “Journal of Advanced Trends in Medical Research” This review highlights the potential of rosemary as a treatment for various types of alopecia, with effects possibly comparable to minoxidil and a favorable safety profile, though further large-scale studies are necessary to confirm these findings.
3 citations
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December 2021 in “Frontiers in Pharmacology” This study found that Ficus benghalensis leaf extracts reduced the activity of 5 α-reductase II and promoted hair growth in rabbits by elongating the hair follicle's anagen phase, suggesting potential for treating hair loss.
6 citations
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May 2023 in “European journal of pharmaceutical sciences” This study found that niosomes significantly enhanced the skin deposition of retinoic acid while reducing its permeation, outperforming other tested nanoformulations.
1 citations
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May 2023 in “Frontiers in medicine” This review explores how hair dyes and perms can damage hair structure and notes that while some adverse outcomes like skin irritation and allergic reactions have been reported, evidence from human studies remains inconsistent regarding potential risks, including cancer.
May 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This review highlights that natural hair dyes from plant-derived pigments can produce viable colors on gray hair with low irritation potential, though they face challenges in shade range and consistency; some products may also be adulterated, affecting safety perceptions.
May 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This review summarizes current research on natural hair dyes, reporting that plant-based formulations can safely provide viable colors on gray hair with minimal irritation compared to synthetic options but face challenges in color range and consistency.
This study found that nanoparticles developed with minoxidil-loaded thiolated β-cyclodextrins showed improved drug retention on hair surfaces and did not cause skin irritation in rabbits, suggesting potential for topical scalp disease treatment.
10 citations
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January 2013 in “International Journal of Research in Pharmaceutical Sciences” This study found that a microemulsion containing extracts of Hibiscus rosa sinensis and Murraya koenigii was non-irritating and more effective at controlling hair loss than a standard marketed formulation.
May 2023 in “Jurnal farmasi sains dan praktis” In this research on cinnamon and virgin coconut oil hair tonics, F2 and F3 demonstrated stable physical properties and mild irritation potential, while formula 1 remained non-irritating but less stable regarding pH and viscosity.
30 citations
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September 2017 in “Environmental health perspectives” This study found that potential exposure to Corexit™ dispersants during the Deepwater Horizon cleanup was associated with increased respiratory, dermal, and eye irritation symptoms among responders both during the cleanup and up to three years later.
15 citations
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February 2014 in “Toxicology Letters” This study found that osthole, a coumarin derivative, demonstrated significantly higher skin accumulation and potential skin irritation compared to coumarin, which showed negligible alterations in protein biomarkers.
In this study, researchers developed isotretinoin-loaded Delonix polymeric nanoparticles that target hair follicles and found they effectively sustained drug release, reduced IL-6 production in vitro without inhibiting P. acnes, and may prevent isotretinoin-related skin irritation in vivo in Wistar rats.
17 citations
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June 2017 in “Journal of pharmaceutical sciences” This study found that adapalene-loaded nanospheres in a hyaluronic acid gel enhanced skin penetration and were nonirritant, making them potentially suitable for treating acne on oily skin.
15 citations
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November 2019 in “Cutaneous and Ocular Toxicology” This study investigated a liposomal hydrogel system for delivering minoxidil and tretinoin to treat androgenic alopecia, finding that the system enhanced skin permeation of minoxidil while retaining tretinoin on the skin and was non-irritating in animal tests, suggesting its potential effectiveness.
2 citations
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June 2024 in “International Journal of Drug Delivery Technology” This review describes advanced drug delivery systems for dithranol aimed at overcoming stability issues and skin irritation seen in conventional formulations, highlighting options like nanoparticles and liposomes for improved psoriasis treatment.
1 citations
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December 2021 in “The Open Dermatology Journal” This study found that a herbal hair oil formulation from various plants showed good hair growth and weight without irritation, suggesting potential for improving hair growth.
December 2024 in “International Journal of Scientific Reports” This study found that OZiva+ advanced hair growth serum significantly increased hair follicle length and showed no irritation, indicating it may be a safer alternative to traditional hair loss treatments like minoxidil.
August 2024 in “International Journal of Pharmaceutics” This study found that a specially designed water-in-oil microemulsion containing Panax notoginseng saponins improved hair density and other hair health indicators in mice with telogen effluvium and androgenetic alopecia, offering a promising multi-mechanism strategy for alopecia treatment with potentially fewer side effects than traditional methods.
January 2026 in “Derecho y cambio social.” This narrative review found that fragrances and isothiazolinone preservatives in deodorants are key contributors to skin sensitization, while magnesium hydroxide shows promise as a less irritating alternative for managing body odor without blocking sweat ducts.
October 2022 in “Journal of the American Academy of Dermatology” This study found that "clean" shampoos are less likely to contain allergenic preservatives compared to traditional shampoos, but both types use fragrance equally, which can be irritating or allergenic.
2 citations
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March 2015 in “Toxicology and Environmental Health Sciences” This study found that rice bran supercritical CO₂ extract was classified as a non-irritant for ocular use but a moderate irritant for dermal use in rabbits and guinea pigs.
19 citations
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July 2019 in “Biomedical Microdevices” This review discusses the safety and potential adverse events of microneedling as both a medical and consumer product, noting the need for further understanding; no new clinical results are presented.
18 citations
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July 2022 in “Frontiers in Immunology” This review discusses the potential impact of volatile organic compound exposure on the onset and progression of autoimmune diseases and reports no new experimental findings.
7 citations
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November 1987 in “Pharmacotherapy: The Journal of Human Pharmacology and Drug Therapy” This article reviews the potential of topical minoxidil to cosmetically thicken hair in some individuals with male pattern hair loss, but it reports no new clinical results.
February 2026 in “International Journal of Advanced Research in Science Communication and Technology” In this review, researchers explored the potential of herbal shampoos as effective and safe alternatives to conventional anti-dandruff treatments, highlighting that polyherbal formulations may offer comparable or superior benefits with fewer side effects.
December 2025 in “Zenodo (CERN European Organization for Nuclear Research)” This review assesses the potential of ginger, garlic, onion, and clove as complementary herbal treatments for hair and scalp health, reporting that onion juice shows the strongest clinical evidence for hair regrowth, particularly in alopecia areata, while garlic exhibits promising preclinical regenerative effects.