A few weeks ago I wrote, what I thought was a simple comment about how I use fasting/calorie restriction that ended up getting 210 votes and causing a lot of differing opinions as to its health benefits.
https://news.ycombinator.com/item?id=12188577
Aubrey De Grey is someone who has done alot of work in this area and I recommend watching his TED talk.
https://www.ted.com/talks/aubrey_de_grey_says_we_can_avoid_a...
Like almost all science in this area, nothing is really proven to work yet.