Unlike a caffeine allergy, which is rare and involves an immune response, caffeine sensitivity is linked to how the body processes the stimulant. Individual differences in metabolism play a major role in determining its effects.
Caffeine remains the world's most widely used stimulant, found in coffee, tea, chocolate, energy drinks and some medications. However, health experts say its effects can vary significantly between individuals, with some people experiencing jitters, headaches, anxiety and sleep disturbances.
Unlike a caffeine allergy, which is rare and involves an immune response, caffeine sensitivity is linked to how the body processes the stimulant. Individual differences in metabolism play a major role in determining its effects.
Research indicates that around 40% of people are fast metabolisers, while approximately 50% are intermediate metabolisers. The remaining 10% are slow metabolisers, causing caffeine to remain in their system for longer and potentially resulting in symptoms such as restlessness, nausea and insomnia.
Because caffeine stimulates the central nervous system, its impact on physical and mental wellbeing can differ widely. Sensitivity may increase during perimenopause and menopause due to hormonal changes, while age-related metabolic changes can also heighten sensitivity and affect sleep quality.
