More deets after the jump!
The ingredient was Sodium Lauryl Sulfoacetate.
Shampoo Ingreds:
Water , Cocamidopropyl Betaine , Sodium Lauryl Sulfoacetate , Disodium Laureth Sulfosuccinate , Sodium Lauroyl Sarcosinate , Glycol Distearate , Sodium Chloride , Decyl Glucoside , Fragrance , Polyquaternium-10 , PPG-5-Ceteth-20 , Sodium Benzoate , Cocobetaine , PEG-55 Propylene Glycol Oleate , Propylene Glycol , Salicylic Acid , Carbomer , Benzoic Acid , Hexyl Cinnamal , Linalool , Benzyl Salicylate , Helianthus Annuus Seed Extract (Sunflower Seed Extract) , Limonene , Benzyl Alcohol , Citronellol , Sodium Hydroxide , Citric Acid
Leave-In Ingreds:
Aqua (Water) , Stearyl Alcohol , Glyceryl Stearate SE , Glycerin , Cetyl Esters , Inulin , Caprylic , Capric Triglyceride , Dicaprylyl Ether , Parfum , Helianthus Annuus Seed Oil (Sunflower Seed Oil) , Simmondsia Chinensis Oil (Jojoba Seed Oil) , Hydroxypropyl Guar , Sodium Benzoate , Caprylyl Glycol , Xanthan Gum , Olea Europaea Oil (Olive Fruit Oil) , Citric Acid , Ethylhexyl Palmitate , Argania Spinosa Oil (Argania Spinosa Kernel Oil) , Hexyl Cinnamal , Linalool , Tocopherol , Benzyl Alcohol , Citronellol , Coumarin , Geraniol
Serum Ingreds:
Aqua (Water) , Glycerin , Corn Starch Modified , Propanediol , Inulin , Sodium Benzoate , Caprylyl Glycol , Xanthan Gum , Hydroxypropyl Guar , Parfum , Citric Acid , Helianthus Annuus Seed Oil (Sunflower Seed Oil) , Hexyl Cinnamal , Linalool , Benzyl Salicylate , Limonene , Benzyl Alcohol , Citronellol , Coumarin
questfortheperfectcurl.com 
I kinda have to wonder about any line meant for curly hair that uses J Lo as the spokesmodel…. Just seem a little strange to have a very straight haired singer/actress be the one to promote this product. (And no, I’m still not over J Lo using the N word in one of her songs about 5 to 10 years ago)
Well that is the thing – it’s not really “for” curly hair. It’s just supposed to be a frizz fighting line – the descriptions either say “frizzy and unruly” or “chemically treated and damaged.” But you’re right it wouldn’t make sense to use someone with straight hair as the model for a curly hair line.