Drinking coffee on an empty stomach to combat insomnia? It can increase cortisol levels, harming the nervous and cardiovascular systems.
Russian neurologist Inna Filatova states that caffeine raises cortisol levels. This effect is stronger when consumed on an empty stomach, leading to anxiety, tachycardia, and autonomic nervous system issues.
The doctor notes that caffeine also disturbs sleep quality and amplifies chronic stress. It puts extra load on the hypothalamic-pituitary-adrenal axis, disrupting the body's homeostasis.
Patients with migraines, anxiety, or sleep disorders should avoid caffeine, as it can worsen these conditions.












