- The road to healthy and strong hair begins with taking good care of the scalp. You are in luck! Our Onion Scalp Serum for hair growth will put life and bounce back into your locks and stop premature hair fall. Say goodbye to weak hair with Mamaearth Onion Scalp Serum. Onions are an excellent source of natural sulfur that is known to prevent breakage, split-ends, and thinning. This nourishing and hydrating formulation of Red Onion, Vitamin B, Pea Sprout, and Aloe Vera will give you healthier, shinier and thicker hair. It works by nourishing the scalp, stimulating blood circulation, and accelerating healthy hair growth. Pea Sprout being an antioxidant, promotes hair growth while strengthening the hair follicles. The Onion Scalp Serum is water-soluble and deeply absorbs into the scalp without making it feel oily or greasy. It is free of harmful chemicals and toxins such as Silicones, Parabens, Mineral Oil and Dyes.