[aantix]

You're leaving out nutritional deficiencies. Specifically, magnesium, for which most are deficient.

When you increase your levels of magnesium, suddenly it's easier to be present, meditate, mental endurance increases, you can endure much more mental stress.

If you're deficient, it can lead to a bad, downward spiral.

Magnesium Status and Stress: The Vicious Circle Concept Revisited

https://www.mdpi.com/2072-6643/12/12/3672/htm

"The idea of a bidirectional relationship between magnesium and stress was first introduced by Galland and Seelig, in the early 1990s [9,10] and then referred to as the vicious circle. This vicious circle implies that stress can increase magnesium loss, causing a deficiency; in turn, magnesium deficiency can enhance the body’s susceptibility to stress"