Comparison of Bioavailability of Liposomal and Traditional Formulation of Vitamin C

Inclusion Criteria: * Women and men, 18-65 years old. * Signed informed consent. * No injuries or hospitalizations within the last 3 months. * Refraining from consuming any vitamin C supplements or foods enriched with vitamin C for a period of 72 hours. Limiting excessive consumption of red peppers, parsley (stalks), Brussels sprouts, broccoli, turnip, tomatoes, cabbage, spinach, watercress, citrus fruits, and citrus juices. Not taking acetylsalicylic acid (aspirin, polopiryna, etopiryna) during the study. * Participants should fast for at least 8-12 hours prior to the administration of the preparations. Exclusion Criteria: * Unwilling to give consent. * Injuries within the last 3 months. * Cancer (current or past). * Renal dysfunction (eGFR \< 60 ml/min). * Gastrointestinal disorders (including use of antacids). * Tobacco use in any form. * Pregnancy/breastfeeding. * Patient after organ transplantation, after a stroke, use of anticoagulants, use of immunosuppressants. * Female patient receiving hormonal therapy (contraception).