I've taken NADH from ENADA and its pretty good. It does give you an energy boost and it helps with making good bile to remove toxins from the liver, something everyone can benefit from.
It's a very fragile energy compound so it is important to buy it from a good brand. According to ENADA they nitrogen flush every single one of them while being blister packed. You might not get the same benefits if they were just packed all together in a bottle and exposed to oxygen.