“It varies from individual to individual, but consuming more than your normal amount of caffeine could make you feel nervous, anxious, irritable or jittery, and may cause excessive urine production or irregular heartbeat. And for those who have anxiety or insomnia, it could worsen their symptoms.” Some coffee drinkers claim it causes anxiety. Here's what the science says | Salon.com #coffee https://www.salon.com/2019/11/24/some-coffee-drinkers-claim-it-causes-anxiety-heres-what-the-science-says/