Are You More Caffeine-Sensitive? What It Does to Sleep (MedlinePlus)
Are you more sensitive to caffeine than you used to be? The National Library of Medicine's MedlinePlus reference explains why that is possible for anyone: too much caffeine can cause restlessness and shakiness, insomnia, headaches, dizziness, a fast heart rate, dehydration and anxiety, and some people are simply more sensitive to those effects than others. Caffeine reaches its peak level in the blood within an hour of drinking it, and the effects can continue for hours, which is how a second cup at 2pm becomes a 3am problem. MedlinePlus also flags who is more affected: people with sleep disorders, anxiety, arrhythmia or high blood pressure. If your sleep or your heart rate has changed and the only thing you have not questioned is your coffee, this is the reference to read.
Where this fits: Is Perimenopause Making You Caffeine-Sensitive? The Second-Cup Betrayal
Claims this source supports
- Too much caffeine can cause restlessness and shakiness, insomnia, headaches, dizziness, fast heart rate, dehydration, and anxiety.
- Some people are more sensitive to the effects of caffeine than others.
- Caffeine reaches its peak level in the blood within one hour of consumption, and its effects can continue for hours.
- People with sleep disorders, anxiety, arrhythmia, or high blood pressure may be more affected by caffeine.