Nioxin Thickening GelWhat is it: Hair Thickening Gel instantly enhances body and definition, making your hair appear more substantial and creating the illusion of thicker, fuller strands. Experience a boost of volume and thickness that transforms your hair. Why you'll love it: It has versatile styling possibilities, whether you prefer a polished look or a more relaxed vibe, it provides the hold and flexibility to achieve your desired style.