Hair straightening serum, a hair care product formulated to smooth and straighten hair, has become a ubiquitous tool in modern hair styling.
Its popularity stems from its ability to tame frizz, reduce curl, and impart a sleek, polished look to hair. One of the most significant advancements in hair straightening serum technology was the introduction of heat protectants, which shield hair from thermal damage caused by blow dryers and flat irons.