For people who are interested, ''thick blood''is a term use by doctors to explain to their patients that they have a coagulation problem, that the blood tends to clot faster than it is supposed, that is why they recommand aspirin or various other types of agents (warfarin, heparin, clopidrigel and so on).
Having shorter clotting time just implies that there is an increased chance of developping thrombosis (heart attacks and strokes) than someone who has a normal clotting time.
If you have a prolonged clotting (or bleeding, interchangeable terms) time, that means that you are more prone to hemorhaging than a normal person.
The blood is not thick per se and its not based on its protein content (although that does exist and it can be high or low often in malnutrition, cachexia, kidney problems, cancer and so on and so forth).
Hemophiliacs have the opposite problem, their blood is too ''thin'', meaning that it doesn't clot well.
For people who for some reason really don't want to take something else ''more natural'' omega-3 fish oils would have been a way better choice then CoQ10, since it has been shown to increase bleeding time