I really wanted this to work, I’m 68 years old and have led a very physical working life, I was a plumber and drainer for 45 years, I have also built 2 houses, and fully renovated another 3 , including landscaping etc , so as I said I have always worked very hard physically, so maybe that is why I haven’t had the results after 4 weeks of using NMN powder every day, I have been eating much more healthier before I started on the powder and I have really always eaten fresh food rather than processed, at the moment I can’t say I’m jumping out of my skin, or my memory has improved at all , I will keep trying and hopefully I can get the results I want and really was looking for