9. You’re parched.
“Too much caffeine is dehydrating and makes you lose water through frequent urination,” says Hundt. “How much caffeine it takes to create that depends on a few other factors, such as your adrenaline levels and stress, but you can be sure that consuming more than three cups of coffee a day is going overboard.” Over time, the diuretic effects of drinking too much coffee can lead to serious dehydration, which can cause everything from cognitive confusion to heart rhythm issues.
10. Your blood sugar levels are out of whack.
According to doctors at the Mayo Clinic, those who already have diabetes might want to keep their coffee consumption to a minimum. While some research suggests that drinking coffee may reduce your risk of developing diabetes, coffee has also been known to affect blood sugar levels, posing a potential risk to those already struggling with the condition.
