Caffeine is a vasoconstrictor. The headaches are from your brain trying to adjust to the blood vessel change. Quitting even a mild habit can shave some points o

Caffeine is a vasoconstrictor. The headaches are from your brain trying to adjust to the blood vessel change. Quitting even a mild habit can shave some points off your blood pressure. If you drink soda or add cream/sugar to your coffee or tea, you may also find yourself losing some weight from stripping out the empty calories.