Do the Longevity Guidelines represent a personalized diet? 21 February 2023 08:03 Updated No. These are general Guidelines are taken from The Longevity Diet book written by Professor Valter Longo. Related articles Can I chew a gum during ProLon® 5-day? What are the potential side effects of ProLon®? How many times can I repeat ProLon® 5-day? Can I have a sauna or Turkish bath during ProLon® 5-day? Can I consume coffee, tea, infusions or other drinks during ProLon® 5-day?