Five cancer causing chemicals in beauty products have been identified at the website attached.
Onesta is free of parabens, sulfates, propylene glycol, DEA, synthetic colors/dyes, and more. According to another blog review, you have to use a lot of product to get a good shampooing. It is not concentrated and does not suds much. I have smelled the product, and it smells like paradise. More citrus or flowery; definitely not herbal.
On a separate note, please remember that all product lines that are paraben-free do not have a long shelf life because parabens are preservatives . . . So make sure the product is fresh by calling the manufacturer especially if the product does not perform as well as to be expected.