[Bruce Wang]

Per you wife, does one still get the good effects if one drinks decaf?

No.  Something about the process makes it less healthy.

If you're looking for a warm beverage with less caffeine, I recommend Hank's recommendation: green tea.  Both my grandmothers drank that stuff non-stop and lived to ~90.  One was a chain smoker.

[Bruce Wang]

Per you wife, does one still get the good effects if one drinks decaf?

No.  Something about the process makes it less healthy.

If you're looking for a warm beverage with less caffeine, I recommend Hank's recommendation: green tea.  Both my grandmothers drank that stuff non-stop and lived to ~90.  One was a chain smoker.