@stan-douglas posted this chart about a month ago. Pretty interesting. You can use PH strips to test. I 've always heard it is good up to 28-30 days but thats usually based on the BAC water efficacy, I'm not too sure if that would mean the NAD has degraded, although my understanding is it can degrade in that time frame. You would see discolouration like this chart shows here if it is degrading. I've seen all these colours before in my NAD+ research.
[image: 1788730260275-5302f72a-ff55-4ff1-8be7-2f3ca8fb47a4-image.jpeg]
