Intermittent fasting: live ‘fast,’ live longer?

It really comes down to the time between eating vs not. Sustained periods of fasting have different affects, most notably beginning after 4-24 hours but most impactful (for health) between 24-72 hours or more.

Breaking the fast occasionally (ie switching between skipping breakfast or skipping dinner) could be advantageous, as long as you’re still hitting a reasonable length of fast.

https://www.zerofasting.com/the-physiology-of-fasting/