No product in general is good for his health. He flat out told the world that his brain is way worse than he thought. I am sure these considerations and options were made before he retired on monday - and for good reasons, he simply did not realize how bad he has gotten. Brain Trauma is nothing short of absolute certain irreversible damage for life. The studies and discoveries of it in the last 20 years has been astounding and is very blunt. Unfortunately it does not get better by simply halting physical and consequential activity. Bryan can suffer from sever bouts of depression, suicidal tendencies, memory loss, mobility issues and so and so on. By the tone and nature of his abrupt retirement, it would seem he knows - and wanted people to know - that he is or has entered stages of irreversible damage, and he hasn't even been wrestling.
Bryan is very smart and noble and would not want to put that on anyone else at this point. Not his wife; his family; or the fans. Took a lot of courage to do what he did in all honestly, he could have been selfish and said its his life and his body and etc... but from all varying accounts, Bryan is one of the goods guys.