This site cites three specific sources worth checking directly rather than assuming what they cover: an NIH Office of Dietary Supplements fact sheet, an NIH NCCIH overview, and a PubMed search link.
A Magnesium fact sheet from the NIH Office of Dietary Supplements, an Alpha Lipoic Acid overview from NIH NCCIH, and a CoQ10-and-cellular-energy research link on PubMed.
These three citations concern the individual ingredients' general research background — worth noting that Butcher's Broom, L-Carnitine and Turmeric are not separately cited among these three sources, and none of the three represents a trial of the finished combined formula.