Here are eight of the most ingredient active substances (out out of 20 altogether) in every drops of Cortexi and the way they work according to the company:
Grape Seed

Cortexi is a source of grape seed extract, which contains antioxidants that protect your ears. Grape seed extract is rich in antioxidants that are natural such as resveratrol, which is linked to health inflammation throughout our body. A lot of people consume grape seeds extract or resveratrol supplements every day to help reduce inflammation. According to the manufacturers of Cortexi the same antioxidants can help protect your ears.
Green Tea

https://www.mid-day.com/brand-media/article/scam-alert-cortexi-reviews-shocking-truth-revealed-what-customer-have-to-say-23280260

https://www.prlog.org/12960030-cortexi-reviews-new-update-2023-warning-shocking-cortexi-hearing-customer-experience-safe.html

https://www.sympla.com.br/evento/explained-cortexi-reviews-fake-or-legit-what-customer-says-safe-revealed-2023-experience-check/1954906

https://gitlab.pavlovia.org/de-making/demakepis/issues/183829