Most of this and related studies seem to tie back to insulin one way or the other (the article mentioned IGF1, many of the autophagy studies mention the process

Most of this and related studies seem to tie back to insulin one way or the other (the article mentioned IGF1, many of the autophagy studies mention the process only happening with low insulin levels eg http://www.cell.com/cell-metabolism/abstract/S1550-4131(10)00159-2 http://www.cell.com/cell-metabolism/abstract/S1550-4131(10)0...). It would stand to reason managing meal glygemic index would be important (naturally fasting lowers insulin, presumably so would low glygemic index diets)