By the way Bryan Johnson recently mentioned a novel technique of using ultrasound to de-calcify pineal gland for improving sleep as it gets worse with aging - this sounds really intriguing to me.
I dunno about any credible. This (both the problem and the solution proposed) is a direction to explore. The problem and its supposed consequences are a pretty widespread "conventional knowledge" (if not a "city legend") and this way cringe to mention with a serious face without a good reason. So there is likely to be at least some ground.