I CANT THANK YOU ENOUGH FOR THIS TRULY AMAZING PRODUCT! My husband was suffering from chronic fatigue and 'excessive shaking' effecting hands, arms and his speech. Finding it near impossible to get out of bed brought on, we believe from overwork, extreme stress and candida. We tried everything, diets, acupuncture, homeopathy, herbs other nutritional products [too numerous to mention] but his symptoms kept increasing, very frightening, which is why when Mark suggested we try NADH, what we thought at the time, a very expensive product we were too desperate not too! Well after week one a very noticeable improvement. Week 2 a complete turnaround! All 'excessive shaking' symptoms stopped, energy levels returned, brain fog and drain improved enormously and able and wanting to get up in the morning!! INCREDIBLE! I then started to take it, obviously! Sleep improved, energy levels fantastic, big mood improvement and a sharper brain and focus. But for me the best was that the hot flushes and night sweats I was experiencing and getting worse [again tried so many things to no real improvement] completely went after 2 weeks! Please do not hesitate to give this wonderful product a chance to transform your health and wellbeing! We also take the Mega Hydrate along with NADH it as mentioned taking both in a previous review . Believe this has supported such a quick turnaround in our health.