Great science report.
Since the abundance of healthy mitochondria in our cells is essential for our health, it's best to avoid things that can inhibit them.
Any suggestions on which products are potentially the least or most harmful to our mitochondria?

Co Q 10 is a well recognized supplement that helps mitochondria to function (and helps to reverse some of the damage caused by statin drugs.)
Symptoms of unhealthy mitochondria are muscle pain and weakness, this also includes the heart muscle, due to reduced ATP formation by our mitochondria. ATP is the molecule our muscles use for energy.