About half of the Coenzyme Q10 in your body is made in your liver and the rest comes from food. Many foods have some amount in them. Good sources are soy, canola oil, wheat germ, rice bran. However, even these have just small amounts. So it's a good thing that your body doesn't need much. Your body does need plenty of vitamin C, vitamin E, the B vitamins and selenium to properly make CoQ10.
If you are deficient then supplements are the easiest way to go. If you are not deficient then supplements are a waste of money. Vegan supplements are available here.
Great spirits have always encountered violent opposition from mediocre minds. - Albert Einstein
My husband has a deficiency in Q10, also a low white blood count or something He had tests about 3 months ago, has taken some vitamins and wont go back to get it checked out. I could slap that bloke sometimes.