SJS, I have a catalog here (Nutrition Warehouse 800-645-2929) which has 60 count 1.8 mg Ecological Formulas NADH for $14.37, or about a quarter per pill. At, say, 5 of these a day (you mentioned you take 4-5 ) (9 mg), that's $1.25 per day or $37.50/month. The 15 mg dose also discussed would be about $1/day more. How much would the sublingual droplets add to the cost, and how important are they (and the every three hour usage)? I had been delaying taking because I thought it cost a lot more. (Hope this math is right. I had to take calculus 3 times in college in order to get through it.) I just saw a paragraph in a newsletter panning DHEA, which I have been taking. It says that Arthur Schwartz, Ph.D.., professor of microbiology at Temple University, who has been studying DHEA for 20+ years, says it "can't reverse aging or cure disease." I've been taking it not for those 2 goals, but to increase energy. I have more energy, but it could because of the Q10 and other more ordinary vitamins,/minerals/anti-oxidants I take. Anyone just taking DHEA think it is worthwhile???