Hi Hixxy,
The problem is far more complicated than your question suggests, at least in the pssible solutions. I'll mention a few of the complications. First, there is the tremendous difference by brands. Some brands are much more effective than other brands of purportedly the "same" substance. So things I have found or other people, that makes a difference by brand includes at least mb12, adb12, SAM-e, L-carnitine fumarate, omega3 oils. Sometimes the difference is the source of the substance that is packaged by the brand. Sometimes it is different form. So Krill oil may be different from a different fish oil. Coq10 comes in 2 forms, one of which is probably more effective. Some differences are knock your socks off difference, some are minor that only some people notice. L-carnitine comes in at least half a dozen varieties made by many different companies, packaged by even more different companies.
Sometimes there are things that have to occur FIRST before mito treatment for example might be effective. Suppose there are 10 different treatments possible, each coming in 1000 combinations of brands and forms and that only 3 or 4 of those many thousands of forms and combinations and brands are effective but only if you a, b, and c first. I found that I had to revisit things over and over. I had to do the same or variations each time I made a differrent successful change. Order can be very important.