This study is from 2011: Carboxy alkyl esters of Uncaria tomentosa augment recovery of sensorineural functions following noise injury Now, if you look into what CAE is, it’s Cat’s Claw Extract. There is an updated study from 2019 in regards to using CAEs for NIHL: Can a drug that repairs DNA help prevent noise-induced hearing loss? Learn about the audiologist testing this novel treatment. I have only found one mention of this study or product (Optogenix AC-11) on these forums. Is this something we should be interested in? I know there is a lot of fluff out there but in researching CAEs it seems that the DNA repairing properties are in fact real, I just don’t know how this really translates to OHC regeneration.