I read that 35 years ago or so, before internet LOL...
Here's a results list -
stress depletes B vitamins - Google Search
adding can help you cope with stress -
vitamins for stress and anxiety - Google Search

Deep breathing (sometimes called diaphragmatic breathing) often helps to reduce stress also. stress & pain , tension all affect our breathing shallower, faster... so we are getting the most oxygen in or expelling the old air out..
Deep breathing often helps to reduce stress also - Google Search