Kurzweil famously took/takes large numbers of vitamins / supplements / pills each day, in order to extend his life and health. I’d love to read a followup on th

Kurzweil famously took/takes large numbers of vitamins / supplements / pills each day, in order to extend his life and health. I’d love to read a followup on that. Did it work? Were there any side-effects? How is he measuring whether it is working?