Comparaison de différents vernis à ongles en matière d’efficacité photoprotectrice. Étude de l’intérêt de leur recours en soins de support en oncologie

Nail Polishes: A Review on Composition, Presence of Toxic Components, and Inadequate Labeling

Nail polishes were developed in 1920, and since 1940, it has been known that these cosmetics contain toxic and sensitizing components. Over the years, nail polishes have undergone several changes in their formulation to avoid this problem, but new components have also been considered toxic and allergenic. The growing demand for gel nails has also been highlighted in cases of allergy to (meth)acrylates, and the biggest concern that was previously related to the presence of toluene sulfonamide-formaldehyde resin (TSFR) in traditional nail polish formulations is now also part of (meth)acrylate-based cosmetics. The beautification caused by nail polish is the main factor behind its constant use throughout the world, but studies have demonstrated its use for other purposes, such as treating fungal diseases, sun protection factor in cancer patients, and as a possible ally in forensic area. This review brings the beginning of the discovery of nail polish and its trajectory to the present day, including its effects on health and its inadequate labeling. Therefore, it is extremely important that legislation monitors the composition of nail cosmetics and that new formulations are studied to make them safe for health and the environment.

Nail cosmetics: What a dermatologist should know!

Nail cosmetics industry is growing at an enormous rate globally due to a surge in nail care all around the world. Various nail cosmetics are available, such as nail polish along with its variants like shellacs, finishes, artificial nails, adornments, and nail polish removers. Nail cosmetics serve aesthetic as well as therapeutic purposes, with the end result being smooth, attractive nails. Nail grooming procedures have evolved from a basic manicure to many other advanced procedures like gel nails, nail tattooing, etc. Although a majority of nail cosmetics are considered safe, they may have potential complications, including allergic and irritant reactions, infections, and mechanical effects. The majority of the procedures related to nail enhancement are not performed by dermatologists but by beauticians with inadequate or no knowledge of the nail's anatomy and functions. The hygiene at the so-called nail-salons/beauty parlours is not standardized, leading to acute complications like paronychia and nail dystrophy following matrix injury. The use of nail cosmetics has become widespread, making it essential for dermatologists to be aware of the nail care products, aesthetic procedures pertaining to nails, and related adverse effects.

[Integrated podiatrist care for prostate cancer patients treated with docetaxel: Feasibility and results]

BACKGROUND

Docetaxel is frequently used for the treatment of metastatic prostate cancer patients. Nail toxicity is a commonly described side effect, but no precise recommendation exists concerning its management. We experimented the integration of a podiatrist in routine cancer care.

METHODS

Patients having received docetaxel for a metastatic prostate cancer since the arrival of the podiatrist were studied.

RESULTS

Fifty-six patients were included, half had docetaxel-induced nail toxicity and 18 were referred to the podiatrist. The integration of the podiatrist in routine care was feasible and allowed characterizing nail toxicity. The main lesions observed were non-coagulated nail hematomas, coagulated nail hematomas and onycholysis. This experience led to propose an integrated care for docetaxel-induced nail toxicity.

CONCLUSION

The integration of podiatrist care is feasible in routine cancer care and can help improving the management of docetaxel-induced nail toxicity in metastatic prostate cancer patients.

Safety and Efficacy of Nail Products

Over the past several decades, the commercialization of nail cosmetics has increased. From nail polishes to artificial nails, different methods of nail beautification have become popularized. However, the impact of these products remains largely unknown. Governments have passed legislation in attempts to regulate nail cosmetics, but these regulations may not be adequate and are difficult to enforce. Knowledge of the safety and efficacy of nail products remains limited due to the relative dearth of literature published on the topic. This review serves to summarize and interpret the data available regarding common nail products and their safety and efficacy. Nail products such as nail polish, nail polish removers, and artificial nails have shown to have some adverse effects through case reports and studies. Harmful substances such as toluenesulfonamide-formaldehyde resin and methacrylates have been identified in commercial nail products, leading to several adverse effects, but in particular, allergic contact dermatitis. Exposure to substances such as acetonitrile found in removers may have more toxic and caustic effects, especially if ingested. In addition, for nail technicians there are negative effects linked with occupational exposure. Compounds used in nail products may become aerosolized and lead to asthma, eye and throat irritation, and even neurocognitive changes.