BackgroundFast fashion has transformed the clothing industry by providing consumers with trendy, affordableclothing at a rapid pace. However, this industry heavily relies on chemicals like azo dyes, phthalates,PFAS, and particularly formaldehyde, which present significant risks to human health and theenvironment. Formaldehyde’s long-term impacts, specifically within the lifecycle of fashion products,remain poorly understood, with limited public awareness.MethodsThis paper investigates the use of formaldehyde in fast fashion, emphasising its environmental and healthimplications. Analysis focuses on the environmental contamination caused by formaldehyde-treatedtextiles, including water pollution, landfill leaching, and indoor air quality issues. Additionally, itexamines formaldehyde’s carbon footprint to estimate its broader environmental impact.ResultsFindings highlight the health risks associated with formaldehyde exposure, including skin irritation,respiratory issues, and other long-term health risks for both garment factory workers and consumers.Current regulatory measures and industry standards aimed at reducing formaldehyde use in fast fashionare reviewed, revealing significant shortcomings.ConclusionThis study underscores the need for more sustainable practices within the fast fashion industry. Itrecommends comprehensive lifecycle assessments to better understand and mitigate formaldehyde’senvironmental impact and advocates for stronger regulations to safeguard both human health andenvironmental sustainability.