Dear Sara, so thankful seeing your video about NMN. This is 1st time I heard NMN. I suffer lack of energy these few years n don't know why n how to regain my energy like before as a sports man. It could be I am ageing n older. So now I learn from you what's it about, Is it that in Singapore this product is easily available at pharmacy? Like your explanation very much, clear n easy to understand. Very good your series !!!