Also, I participated in a caffeine study (~1988) and it may be the one cited. The interesting result is at the end but, read on for the details.

The study was done at Stanford but I don’t recall the sponsor. We drank 32 oz of regular brewed coffee (via their coffee and exacting brewing instructions) for a month. We had many blood tests with the samples going to Stanford’s medical center and to several other labs to see what the lab accuracy was (this is another whole topic by itself!).

The group (~150 folks) was then split into three subgroups and we went our separate ways: cold turkey, decaf, and keep on drinking brewed regular coffee. I was in the decaf group and we drank 32 oz of coffee per day as before but with decaf coffee supplied by the study and brewed just as carefully. Even I, whose taste buds were shot off in the war, could taste the difference with the first sip. Yuck!

Well, anyway, we drank coffee and got tapped as before with all the tests for another month. The result was a jump in the blood triglycerides of the decaf sub group.

Well, the funny part is the study decaf was solvent decaffeinated coffee which is not common anymore. So, the whole thing was for not much.

All I discovered is that I got a thumping good headache coming off of the caffeine. Also, since blood labs cholesterol numbers differ a lot given the same sample, one should not trust the cholesterol numbers your doctor tells you too much.