Caffeine is a common stimulant found in many medications, foods and supplements. While most people can consume small amounts of caffeine without issue, caffeine-sensitive individuals may experience side effects with any amount. Understanding your own body’s response to caffeine can help you determine whether you have an intolerance to the substance.
Identification
Caffeine intolerance refers to a general sensitivity that involves one or many organ systems. According to TeensHealth.org, caffeine sensitivity may be determined by a combination of factors, such as body size and use of certain medications. The amount of caffeine you consume daily plays a large role in determining your tolerance level. MayoClinic.com states that most healthy adults can tolerate 200 to 300 mg per day with no problems, while sensitive individuals experience negative effects with any amount.
Signs and Symptoms
The signs and symptoms of caffeine intolerance often resemble those of larger doses of caffeine in a non-sensitive person. According to Drug Information Online, nausea, irritability and nervousness are common side effects of caffeine. In larger doses, caffeine has been linked to more serious problems like depression and anxiety. Since caffeine affects many organ systems, the signs and symptoms of intolerance can also manifest in many diverse ways. Gastrointestinal symptoms like diarrhea or upset stomach, neurological effects like jitteriness and urinary symptoms like frequent urination can all signal caffeine intolerance.
Application
Gauging your own body’s response to caffeine is the best way to determine whether you have an intolerance to the substance. If you suspect caffeine intolerance, you may need to reduce or eliminate it from your diet to prevent unwanted symptoms. MayoClinic.com suggests replacing caffeinated drinks with decaf coffee, herbal tea or caffeinated drinks that are brewed for a shorter period of time. Quitting caffeine abruptly can trigger withdrawal symptoms like headache and irritability, so it’s usually best to reduce your intake slowly over a period of days or weeks.
Considerations
Caffeine intolerance is not the same as caffeine allergy, which can cause life-threatening reactions like anaphylactic shock. People with true caffeine allergy should avoid the substance in any amount. Certain medications like ciprofloxacin may temporarily increase your sensitivity to caffeine by preventing your body from breaking it down properly.
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