Healthy, shiny hair is often seen as a reflection of good overall care and confidence. However, pollution, heat styling, chemical treatments, stress, and poor nutrition can weaken the hair structure over time, leaving it dry, brittle, and prone to breakage. This is where keratin steps in as a powerful solution. Known as one of the essential building blocks of hair, keratin treatments have become increasingly popular for restoring strength, smoothness, and vitality. But what exactly is keratin, and how does it help in achieving stronger, healthier hair?