Coffee can also affect blood sugar in some people with diabetes. My dad learned that the hard way when his numbers started going haywire with no explanation. Turned out to be the coffee...

Lemon water first thing in the morning helps if you're prone to a sour stomach or acid reflux. I went through a period of chronic indigestion and deleting coffee/tea/caffeine and ingesting lemon water helped a LOT.

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Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)