This is Mamaearth Onion Hair Serum with Biotin For Strong, Frizz-Free Hair provided by Womancart Online Store. It's time to trust the goodness of onion, an age-old home remedy to address hair issues like frizz, breakage, and hair fall. Onion is rich in sulfur that makes your hair strong and reduces breakage. Biotin improves overall hair quality, reduces breakage, and increases thickness while olive oil helps in making hair smooth, and frizz-free.