Fasting can increase growth hormone levels by binding ghrelin to the growth hormone releasing hormone receptor, which can burn off body fat, improve muscle and general tissue health, cartilage, etc. (Huberman Lab Podcast #18). Fasting can also promote cellular repair and clearance of all kinds, and any time you haven't eaten for a while or blood glucose is low, you're biasing your system toward a state of cellular repair (Huberman Lab Podcast #41). Intermittent fasting can help increase growth hormone output, which can help more in older age groups than younger age groups, and it's probably going to help your growth hormone and subsequently Igf One levels (Huberman Lab Podcast #67).
This is not medical advice. Consult your physician before changing protocols.