Recent News: The Deep. Natalie Farrow was recently cast on Freeform's new pilot The Deep. They are waiting to see if it get's picked up, Catch Natalie Farrow's interview, talking all things iZombie and what it was like to play Ginger.
Caffeine can increase blood pressure; long term consumption at sufficiently high doses has been associated with chronic arterial stiffness. Blood pressure increases are mediated by adenosine receptor antagonism. Caffeine can cause vasoconstriction. It is unclear if caffeine causes increased heart rate as a side effect.
Caffeine levels in coffee vary even more than simply being caffeinated or decaffeinated. The roast of the coffee and the coffee bean play a large role in how much caffeine the coffee contains. Understanding how these affect the caffeine levels can help coffee drinkers choose a coffee that best suits their needs.