This site cites six specific external sources — worth checking each one directly rather than assuming what they cover.
A Healthline overview on magnesium glycinate, a WebMD overview on alpha lipoic acid, a PubMed article on butcher's broom and circulatory support, an NIH Office of Dietary Supplements fact sheet on L-Carnitine, a PMC article on curcuminoids, and a Wikipedia article on Coenzyme Q10.
This site is direct that these ingredients each carry their own independent research and traditional-use history — worth reading each source with that specific distinction in mind, since it's ingredient-level background, not a trial of the finished combined product.