Ultimately it came down to the feasibility and synergy of all the ingredients. As NAD+ is a delicate coenzyme, and we were adding 100mg per capsule, we had to be very careful in the studies of feasibility and protecting NAD+ within the capsule. Some of the benefits of using magnesium stearate is that it allows the various delicate ingredients to stay intact and reduce capsule weight variation. We definitely knew of the potential side effects with magnesium stearate, however, our medical staff at our clinic personally tested the form selected as well as each individual ingredient to assure that they would have no harmful effects within the human body and are tolerated well - even by patients with high sensitivities.