These things also have a deleterious affect on our immune systems too. This is why in high stress times we often " catch a cold" or have symptoms of an upper respiratory illness. Typically you see a rise of illness around November- January with all the added stress of the holidays, coupled with an increase in social gatherings.

,this is truth
also we have the wrong types of stress
,if we all was trained as seals light, i bet we have better nations world wide😆☝️