It’s less about the tea and more about finding some thing that your irrational depression is begrudgingly forced to admit might help. For me, I get low fast if my sugar/protein ratio gets way out of whack. When sitting there sure that I will never be happy again I am forced to admit that I have been wrong about this exact scenario before, when in reality I just needed a sandwich.
I’m not sure that many normals can explain that though.