I've been using It's a 10 leave-in spray for years. It saved my hair when I was highlighting it, but over time, my hair texture changed and it was often weighed down. I played around with a lot of things and decided I wanted to try out some other It's a 10 formula. I searched for articles comparing the formulas but I couldn't find any. So I researched one at a time to see how the ratings compared. I researched different versions and the one that seemed to get an abundance of high ratings was the It's a 10 with keratin.
What I loved about this formula was that it had all the benefits of the original but it felt lighter. It still detangled my hair and added shine but my hair didn't feel as weighed down.
Since it has keratin, it also helps to strengthen my hair which has been pretty brittle as of late. I always thought keratin was for people who have had a keratin treatment. As a read more I realized keratin helps hair to be stronger and more resilient to damage.
Bottom line: If you're a fine haired girl like me but you love It's a 10, give the keratin formula a try. All of the benefits and less of the weight.