The Green Beauty Guide (2024)

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Cosmetics’ Safety: Gray Areas with Darker Inside

Abdul Kader Mohiuddin

2019

Cosmetic items contain a wide scope of chemicals to which we are exposed every day. All cosmetics were separated into 3 classifications: rinse-off items (shower gel, shampoo, toothpaste, liquid soap, private soap, shaving foam) leave-on items (body cream, face cream, hand cream, antiperspirant, sunscreen, post-shaving astringent) and make-up ones (lipstick, lip-balm, foundation, nail polish). The utilization of a significant number of these substances is permitted inside specific limits, because of their toxicity at higher concentrations. Other significant viewpoints ought to be considered as, for example, the likelihood of long-term effects. In the light of the continuous and close nature of the contact on skin and mucosa with these items, it is significant that they don’t contain conceivably perilous substances. Additionally, the everyday use and continuous exposition of people to a wide scope of personal consideration items and to various types of chemicals, got from a few sources, may cause the alleged “cocktail effect” because of the synergistic interaction of various substances and, likewise, the “added substance effect” in light of the nearness of a similar ingredient in numerous items. Actually, every one of the ingredients utilized in cosmetic items meet certain regulatory prerequisites. Notwithstanding, the utilization of numerous substances is permitted inside specific limits, because of their toxicity at higher concentrations.

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Harmful components of cosmetics

Татьяна Дыченко

2016

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Skin Toxicity of Selected Hair Cosmetic Ingredients: A Review Focusing on Hairdressers

Henk Van Der Molen

International Journal of Environmental Research and Public Health

The safety assessment of cosmetics considers the exposure of a ‘common consumer’, not the occupational exposure of hairdressers. This review aims to compile and appraise evidence regarding the skin toxicity of cysteamine hydrochloride (cysteamine HCl; CAS no. 156-57-0), polyvinylpyrrolidone (PVP; CAS no. 9003-39-8), PVP copolymers (CAS no. 28211-18-9), sodium laureth sulfate (SLES; CAS no. 9004-82-4), cocamide diethanolamine (cocamide DEA; CAS no. 68603-42-9), and cocamidopropyl betaine (CAPB; CAS no. 61789-40-0). A total of 298 articles were identified, of which 70 were included. Meta-analysis revealed that hairdressers have a 1.7-fold increased risk of developing a contact allergy to CAPB compared to controls who are not hairdressers. Hairdressers might have a higher risk of acquiring quantum sensitization against cysteamine HCl compared to a consumer because of their job responsibilities. Regarding cocamide DEA, the irritant potential of this surfactant should not be overlooked. ...

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Skin safety and health prevention: an overview of chemicals in cosmetic products

Marcello Guido

Journal of Preventive Medicine and Hygiene, 2019

Summary Introduction Cosmetic products contain a wide range of chemicals to which we are exposed every day. The aim of the study was to determine the presence of potential dangerous substances which can cause adverse health effects by examining product labels. Materials and methods A total of 283 products were collected from various shops in Lecce (Italy) and divided into 3 categories: rinse-off, leave-on and make-up. The label of every product was examined and a list including fragrances, preservatives and other chemicals of concern was created. Results Fragrances were present in 52.3% of the examined products, mostly limonene (76.9%) and linalool (64.6%) but also citronellol (34.1%), geraniol (31.5%), coumarin (30%) and hexyl cinnamal (29.2%). Preservatives showed a rate of 60% and the most frequently identified were phenoxyethanol (48.7%), sodium benzoate (35.6%), potassium sorbate (22%), methylparaben (15.2%) and MI/MCI (9.9%). The other chemicals of concern were detected in 58%...

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Estrogenic and anti-estrogenic activity of off-the-shelf hair and skin care products

Raymond Tice

Journal of Exposure Science and Environmental Epidemiology, 2014

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Assessment of the antidandruff activity of a new shampoo: a randomized, double-blind, controlled study by clinical and instrumental evaluations

Anna Bulgheroni

Skinmed

The aim of this randomized, double-blind, controlled study was to evaluate the antidandruff activity exerted by a new shampoo on patients affected by dandruff and/or mild seborrheic dermatitis by means of both D-squame technique coupled with image analysis and clinical assessments. Thirty-four patients were enrolled and 1:1 randomly assigned to either a test shampoo or a comparative shampoo group. Treatment schedule was twice a week for 4 weeks. The D-squame technique was shown to be able to objectively record variations in scalp desquamation both between test and comparative groups and within the same group over time. The results obtained with this instrumental approach showed a statistically significant reduction by 52% vs baseline after 2 weeks of treatment. There was an even greater reduction after 4 weeks (-66%). This reduction was statistically significant compared with the comparative group at the same time points. The analysis of all the other parameters (except Wood's l...

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Negligible penetration of incidental amounts of alpha-hydroxy acid from rinse-off personal care products in human skin using an in vitro static diffusion cell model

Lewis E Kaufman

Toxicology in Vitro

Alpha-hydroxy acids (AHAs), primarily glycolic and lactic acids, are widely used in cosmetics to alleviate dyspigmentation, photodamage, and other aging skin conditions and as pH adjusters. Glycolic acid reportedly enhances skin damage after repeated ultraviolet light exposure, e.g., increased sunburn cell formation. This study assessed potential in vitro skin penetration of lactic acid and malic acid incorporated into rinse-off personal care products, compared with rinse-off and leave-on exposures to glycolic acid (10%, pH 3.5) in a reference lotion. Radiolabeled AHA-fortified shampoo, conditioner, and lotion were evenly applied as single doses to human epidermal membranes mounted in static diffusion cells (not occluded). Exposures were 1–3 min (rinse-off) or 24 h (leave-on). Epidermal penetration of malic acid and lactic acid from the rinse-off shampoo and conditioner, respectively, was negligible, with >99% removed by rinsing, a negligible portion remaining in the stratum corneum (⩽0.15%), and even less penetrating into the viable epidermis (⩽0.04%). Glycolic acid penetration from the leave-on reference lotion was 1.42 μg equiv./cm2/h, with total absorbable dose recovery (receptor fluid plus epidermis) of 2.51%, compared to 0.009%, 0.003%, and 0.04% for the rinse-off reference lotion, shampoo (malic acid), and conditioner (lactic acid) exposures, respectively. Dermal penetration of AHAs into human skin is pH-, concentration-, and time-dependent. Alpha-hydroxy acids in rinse-off shampoos and conditioners are almost entirely removed from the skin within minutes by rinsing (resulting in negligible epidermal penetration). This suggests that ultraviolet radiation-induced skin effects of AHA-containing rinse-off products are negligible.► 10% glycolic acid lotions reportedly increase skin damage after UV light exposure. ► Penetration of AHAs into human skin is pH-, concentration-, and time-dependent. ► We examine in vitro human skin penetration of AHAs in rinse-off products. ► Rinsing within minutes removes >99% of AHAs in rinse-off products from the skin. ► AHAs in rinse-off products likely do not increase UV-dependent skin effects.

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Advancement in Shampoo (A Dermal Care Product): Preparation Methods, Patents and Commercial Utility

Dr. Rishabha Malviya

Recent Patents on Inflammation & Allergy Drug Discovery, 2014

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New scientific arguments for regulation of ethylene oxide residues in skin-care products

Johannes G Filser

Archives of Toxicology, 1994

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Hair Care Cosmetics: From Traditional Shampoo to Solid Clay and Herbal Shampoo, A Review

Paola Fini

Cosmetics

Hair is an important part of the body appeal and its look is a health indicator. Accordingly, recent advances in hair science and hair care technologies have been reported in literature claiming innovations and strategies for hair treatments and cosmetic products. The treatment of hair and scalp, primarily, involved the use of shampoo for an effective, but gentle cleansing; however, for years, the shampoo is considered not only as a cosmetic product having the purifying purpose, but it is also responsible for maintaining the health and the beauty of hair, imparting gloss and improving manageability. For meeting the needs of a multitasking formulation, following also the recent marketing-trend addressed to the "natural world", new challenges for cosmetic technology are aimed towards the research of natural ingredients, as well as new techniques for shampoo formulation. Regarding the recent development of solid shampoos, little information is available about their use, formu...

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