The Quest Specialized Supplements series includes supplements with special action that do not fall into any of the other categories. Lecithin provides lecithin, which contributes to the health of the arteries and maintains good cholesterol levels. Coenzyme Q10 30mg and Coenzyme Q10 150mg yield 30mg and 150mg coenzyme Q10, respectively. Coenzyme Q10 exists in all cells and is essential for energy production and fatigue reduction.