Keratin can be purchased as , salon-exclusive professional systems , or daily maintenance products (shampoos and conditioners) through major retailers and brand-direct stores. For DIY enthusiasts, at-home kits are widely available on Amazon and at Walmart , while professional-grade systems like Keratin Complex typically require professional credentials for direct purchase. Popular Retailers and Brands Keratin Complex - 23 Products - Ulta Beauty Keratin Complex - 23 Products | Ulta Beauty. Keratin Smoothing Treatments