Não dê importância a histórias do tipo "isca de clique

Papel para gerar medo no público

The report from UCSD researchers Zhivagui et. al. published January 17, 2023 tries to accomplish a lot in one report, but it falls short. Reading the report a few times reveals statements that the authors want to create a study that supports their own beliefs that nail curing lights are dangerous. This is not solid, proper, or even decent science. This is a paper to generate fear in the public and directly attacks our industry. It is my impression they feel there is little to no science behind the chemistry and curing technology is used in gel nail products. Let me illuminate my points with a few remarks:

Original Article – Comunicações da Natureza 
Artigo do Yahoo Life
Dail Mail – Artigo de jornal on-line

1. Os pesquisadores não forneceram controles e detalhes suficientes sobre os testes na pele real e não em células clonadas da pele em uma placa de Petri (com todas as camadas dérmicas a serem incluídas na exposição à fonte de energia). As camadas externas da pele fornecem proteção para as camadas internas, subdérmicas, que correm mais risco de desenvolver câncer.

2. O tempo de exposição à fonte de energia é extremo, 20 minutos por exposição, em comparação com os tempos de exposição de salão de 30 a 60 segundos por exposição.

a. No salão de beleza: 3-5 exposições, totalizando o tempo de exposição de 1,5 a 5 minutos.

b. No estudo: 2 ou 3 exposições totalizando 40-60 minutos.

3. The number of 20-minute exposures in a short time frame – 2 exposures in 3 hours or in a different portion of the study, (3) 20-minute exposures over a 3-day period. This would never be done in a salon.

4. Não há controle para o efeito do calor da luz de cura sobre as células no teste.

5. Não há um espectrógrafo detalhado da irradiância da luz de cura que varia de 280 nm a 400 nm. A avaliação adequada da irradiância da luz de cura é essencial para avaliar a quantidade de energia que foi emitida de 280 nm a 400 nm.

a. Foi usada uma unidade de teste de UV que provavelmente foi comprada na Amazon por $153.

6. The calculation of energy exposure (pg 9, under “Methods”) assumes that all energy is created equal for its effect on tissue – from 280nm to 400nm. This is certainly NOT the case based on other portions of their study as listed in the report wherein it is notated that UVC and UVB have differing mutagenic effects on the cells.

7. The authors state in their own report that there is insufficient time between exposures to allow the cells to recover from the exposure. Here they are admitting that the study that they designed and conducted is poorly done. Page 9, under “Methods/Cell viability and cytotoxicity assays” the author summarizes (I am paraphrasing) in the paragraph that they chose the worst-case scenario to demonstrate the greatest effect of the UV energy source on the skin cells tested. In short – they admit to creating the worst outcome possible.

8. It is stated in both the report and the article that “future large-scale epidemiological studies are warranted” meaning that these results are generally inconclusive and require more study. It is also stated that it will take “at least a decade to complete” these tests – so 10+ years of work to verify what we already observe in the salon. If their future research is conducted as well as this initial study, they have already formed their opinion and will design further testing to support their unfounded beliefs. Proper research technique is to approach a topic from a neutral stance, designing the experiments to obtain factual and viable data and then objectively analyzing the results to form a conclusion.

Em resumo

This report was designed, conducted, and written to support their ideas that nail curing lights are dangerous. In the 23 years that I have been making, testing, and improving gel nail systems, I have never heard of one client or nail technician who has developed skin cancer on their fingers that is a direct result of the curing lights. Moreover, I have not heard of anyone developing skin cancer on their fingers in the 23 years that I have been in this industry. That is not saying that it could not happen, I just have never heard about it nor seen it. If this is the best work that can come out of this lab at UCSD, it is shameful. I have seen more impressively designed experiments from college underclass students than from these post graduate PhD researchers.