Many websites have a place where you can enter the product's ingredients to determine if they're Curly Girl approved. For instance, visit one of the websites at http://www.isitcg.com/ or https://www.curlsbot.com/. Look on the back of the product for the ingredient list. Add ingredients to the box on the website, making sure to separate each one with a comma or a comma and a space. Be sure to spell the ingredients correctly; if you misspell something, the website may sort it into the wrong category because it doesn't recognize it. Once you hit "Submit," you'll be redirected to a second page with your results. The website http://www.isitcg.com/ divides ingredients into "Not CG Approved" and "Probably OK," for instance. If any of the ingredients fall into "Not CG Approved," then you want to avoid that product if you're using CG Approved ones. "Probably OK" means that the ingredients didn't directly match ones on the "bad" list or they're on the CG Approved list.

Summary:
Navigate to a webpage that features a Curly Girl ingredient analyzer. Type in the ingredients from the product. Hit "Submit" and look at the results.