India, Jan. 20 -- Hair growth supplements work best when you think beyond oils and serums. While topical care helps on the surface, stronger, fuller hair usually begins with what you feed your body. Nutrients like biotin, iron, and vitamin D play a direct role in how well your follicles function and how long your hair stays in its growth phase. A deficiency can come in the way of the normal hair growth cycle, leading to hair loss, says dermatologist Dr Geetika Srivastava to HealthShots.

That's why the Amazon Great Republic Day Sale 2026 is a smart time to invest in long-term hair care. When you feed your hair the essential supplement, it becomes healthier, longer, and stronger. Some hair supplements are designed to stimulate hair follicl...