People experience fasting differently, which may be based on several contributing factors. If you’re unable to tolerate the side effects and you feel that your health is a concern at any time, we recommend consulting with your primary health care provider. If they have any questions, they can contact us directly via e-mail or phone call at info@prolon.eu, or book an e-consultation with our nutritional coaches by using this link: https://prolon.eu/pages/scientific-team-prolon.