Statins block the production of harmful cholesterol but in the process also block some of the good cholesterol that are vital for brain function. A number of studies have been conducted, with many more underway, showing a link between statin use and Parkinson’s disease, memory loss, muscular atrophy, nerve damage.. etc. Google ‘statin side effects’ for more info.
There’s so much stuff out there regarding statins it is very hard to know what is true or not.
I’ve read that statins reduce the production of CoQ10, weakening muscles, including the heart muscle. My wife took statins and acquired muscle pains. She stopped, but it took a while before the pain went away.