Question: what is the best over the counter keratin treatment?
Answer: Best Drugstore: TRESemmé Keratin Smooth Shine Serum. ... 
Best for Curly Hair: It's a 10 Miracle Leave-In Plus Keratin. ... 
Best for Colored Hair: Rita Hazan Weekly Remedy Treatment. ... 
Best In-Between Treatments: Keratin Complex Infusion Therapy Keratin Replenisher.