I heard that sirtuins are beneficial for a healthy organism, and could be detrimental to someone with cancer. The same goes for something like glutathione (since they make cells more robust, and you don't want robust cancers cells!).

I've read anti-agingfirewalls.com with great interest. Here's one of the articles:

"PART 3: Slaying Two Dragons with the Sound of Silence: – How to Keep Your Repetitive DNA Turned Off with “3 Songs”: Sirtuins, Polycomb Proteins, and DNMT3. And a Master List of Drugs and Natural Compounds for Cancer Chemoprevention"[0]

Anti-ageingfirewalls.com is a tour de force. And it's at least worth reading the earlier articles (some of the recent articles on NAD require significant knowledge).

As far as I can tell, Peat contradicts the consensus. I've tried his methods, and had terrible results. He also goes against the information I'm exposed to. He may be correct, but I assign a tiny probability to that. I wouldn't recommend anyone start with Ray Peat.

[0] http://www.anti-agingfirewalls.com/2013/05/20/part-3-slaying...