A Brazilian blowout is a popular hair treatment designed to smooth and straighten hair. It uses a liquid keratin formula that coats the hair, reducing frizz and enhancing shine. The process typically takes about 90 minutes and can last for several weeks, depending on hair type and maintenance. During the treatment, a stylist applies the keratin solution, followed by blow-drying and flat-ironing the hair. This method is suitable for various hair types, including curly hair and wavy hair. However, it’s important to note that some formulations may contain formaldehyde, which has raised health concerns.