David Baxter PhD
Late Founder
Caffeine and depression: Is there a link?
By Mayo Clinic Staff
Oct 17, 2007
What is the relationship between caffeine and depression? Does caffeine make depression worse? ~ Lisa / Tennessee
Answer
The exact relationship between caffeine and depression isn't clear. There's no evidence that caffeine ? a mild stimulant ? causes depression. However, some people are more sensitive to the effects of caffeine than are others. In such individuals, caffeine may worsen existing depression. How or why this occurs isn't clear. But several theories exist.
By Mayo Clinic Staff
Oct 17, 2007
What is the relationship between caffeine and depression? Does caffeine make depression worse? ~ Lisa / Tennessee
Answer
The exact relationship between caffeine and depression isn't clear. There's no evidence that caffeine ? a mild stimulant ? causes depression. However, some people are more sensitive to the effects of caffeine than are others. In such individuals, caffeine may worsen existing depression. How or why this occurs isn't clear. But several theories exist.
- Although caffeine initially gives you a "lift," it may later have the opposite effect as the effects of the caffeine wear off.
- Caffeine can make it more difficult to fall asleep and stay asleep. A lack of sleep can worsen depression.
- Caffeine appears to have some effect on blood sugar, especially in people with diabetes. Fluctuations in blood sugar can be associated with mood changes.