“液体口罩”突然火了！医生提醒

Core Viewpoint - The article discusses the rising popularity of a product called "liquid mask," a nasal spray that claims to provide protection against respiratory viruses, particularly during the winter season when such infections are prevalent. However, medical experts express skepticism about its effectiveness and safety [1][6]. Group 1: Product Popularity and Claims - The "liquid mask" nasal spray has seen significant sales, with some products selling over 1 million bottles annually, capitalizing on the market demand during the peak of respiratory infections [1]. - Some merchants claim that the spray can create a "physical barrier" in the nasal cavity, asserting a "99.9% blockage rate" against viruses [2]. Group 2: Medical Expert Opinions - Medical professionals, including Dr. Li Bo from Guizhou University of Traditional Chinese Medicine, indicate that while the gel may adsorb viruses, its effectiveness is highly dependent on the spray's coverage area and uniformity within the nasal cavity. They caution that viruses can still be transmitted through the mouth, reducing the overall protective effect [4]. - Dr. Zhang Dawei from the Fifth Medical Center of the PLA General Hospital emphasizes that the "liquid mask" has not undergone clinical validation, and its protective claims lack supporting research data. The product's effectiveness is only demonstrated in laboratory settings, which do not accurately reflect real-world conditions [4]. - The anatomical structure of the nasal cavity complicates the spray's ability to provide comprehensive coverage, leaving areas unprotected and susceptible to infection [4]. - The durability of the protective film created by the spray is questioned, as everyday actions like nose-picking or sneezing can disrupt its effectiveness [4]. Group 3: Regulatory and Safety Concerns - According to lawyer He Shengtian from Guangdong Guoding Law Firm, many "liquid masks" are classified as consumer products rather than medical devices, lacking large-scale clinical validation. Claims of "99.9% virus blockage" may constitute false advertising [5]. - Dr. Li Jia from Capital Medical University asserts that the "liquid mask" lacks scientific credibility and cannot replace traditional masks. Current products are registered as ordinary consumer goods, not as drugs or medical devices, and there is no reliable clinical evidence to support their efficacy in preventing viral infections [7]. - Long-term use of the "liquid mask" may pose health risks, particularly for individuals with allergies, as the ingredients could potentially cause adverse reactions. There is also a lack of systematic evaluation regarding the impact of residual components on nasal health and the effectiveness of other nasal medications [7].