✅ Proudly made in the USA, too. And did we mention that Challenger Tea Tree Shampoo is Gluten Free!? Check out Challenger’s Awesome Conditioner and other premium styling products to help make more good hair days!. ✅ Our products are never tested on animals, and the instructions are easy to follow. “Massage into hair. Rinse. It’s Shampoo.” Easy peasy for men/women/kids. ✅ We’ve got Argan Oil, Vitamin C, Vitamin D, Biotin, Keratin (what hair is made of), Hydrolyzed Rice Protein to build up your hair follicles, and more in this great product. Improve scalp health, thicken and support your hair, and save money with an every other day shampoo. ✅ This Sulfate Free, Artificial Color Free Shampoo has everything you’d want and then some! Amazing scent of Tea Tree, Peppermint, and Eucalyptus, a gentle tingle to let you know it’s working, and all the best hydrating and hair repair ingredients we’ll outline in the next bullet point. ✅ Yep. We’re saying it. You don’t need to shampoo your hair every day. So when you do, make sure you have the best shampoo possible, and that’s Challenger’s Tea Tree Shampoo!.