Complex sentence: Since CoQ10 is synthesised endogenously also, plasma concentrations may not adequately represent cellular concentrations, other suitable targets that can act as surrogates for tissue CoQ10 levels are being investigated.
Split into simpler sentences: Since CoQ10 is synthesised endogenously also, plasma concentrations may not adequately represent cellular concentrations. Other suitable targets that can act as surrogates for tissue CoQ10 levels are being investigated.