There are two distinct issues here: health risks related to
caffeine and health risks related to coffee consumption. Those may be unrelated since coffee also contains a lot of other substances and caffeine can be found in a lot of other beverages; black or green tea, for instance. Sometimes it is the other ingredients in coffee that can cause trouble.
Chronic consumption of large caffeine quantities has been related to lowered insulin sensitivity. That means that, any carbs you consume, have better chances ending as deposited fat tissue... not good. On the other hand, the ergogenic qualities of caffeine are well documented. In fact, caffeine is considered a controlled substance for Olympic events, above certain quantities (measured in blood).
I'd say, as a man of almost 40 (such as myself) you should arrange for a yearly medical checkup. Especially since you are athletically active, and I suppose you want to be in top shape! If something dubious shows up, certainly consult your doctor indicating your high coffee consumption. The problem you mention about hand/feet extremities is indeed known in the bibliography and somewhat linked to coffee consumption, among other things. There is a number of over the counter supplements you can probably take for those issues, as well as prescribed drugs, of course.
Since you mentioned it Robert, is there something in Sweden about coffee? My friend Spiros (who lives in Sweden) also consumes vast quantities of quality coffee, and the same holds true of other Swedes I know! Our own Superswede has something to say about it?
oke:
