Rejuvenol Boosted Keratin Treatment 4 Oz - For coarse, resistant, and extremely curly hair. Water (Aqua), Hydrolyzed Keratin, Propylene Glycol, Amodimethicone, Formaldehyde, Cetrimonium Chloride, Cyclopentasiloxane, Hydrolyzed Soy Protein, Dimethicone, Cetearyl Alcohol, Argania Spinosan Kernel Oil, Quaternium-70, Mineral Oil, Ceteareth-20, Hydrolyzed Collagen, Fragrance (Parfum). We essentially pour the 33 ounce into the 4 ounce jar. Why should you lay out all this money for a product that's just going to sit on the shelf? And then. possibly go bad. You're better off buying it in smaller increments. That way you use whatever you need, and it's not going to go over your budget. This size is cost effective. And if you really want some amazing results, please just email me and I'll give you my skinny on this product as I've been using it for over a decade.