In my medical practice and for my own health, I have used very few single-nutrient supplements. NADH is one of the rare exceptions. That's because of my understanding of how it works, the effects I saw in people in my practice, and the significant body of research documenting its safety and effectiveness.
A central tenet to my approach to nutrition is that the more complex the food source, the more nutritious it is likely to be. An example is chemically-derived B vitamins in supplement form, versus from fresh liver, which is replete with these same vitamins. My choice is always the latter, because I want to present my body with all the nutrients in the food and let it decide which to absorb.
If I were asked, "What is the point of all these medicines, products, webinars, podcasts and interviews that make up the structure of your company?" my answer would probably be, "to help my friends see the world a little bit differently."