Collagen drink absorption measured in healthy men

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Healthy male volunteers to avoid any possible hormonal interference. * Between 25-45 years old (both included). * Body weight is 70 kg (60-80 kg (both included), the range depends on the body mass index (BMI). BMI in normal (healthy weight and overweight) range: 18.5 to 29.9 kg/m2. (Reference: WHO and CDC). * Co-operative and available during the study period. * Subjects with capacity to understand the purpose and protocol of the study and sign the Informed Consent. Exclusion Criteria: * \- Diagnosis of allergies to gelatin, red meat (Alpha Gal Syndrome) or fish. * Diagnosis of diseases about collagen metabolism such as Goodpasture syndrome, scleroderma, periarteritis nodosa or polyarteritis, dermatomyositis, and disseminated lupus erythematosus. * Diagnosis of following chronic Gastro-Intestinal Tract diseases blocking transfer of polypeptides from GIS to the blood such as: Peptic Ulcer, Duodenal Ulcer, Chronic Atrophic Gastritis, Helicobacter Pylori, Chronic Peptic Disorders, Chronic Acid Reflux = GER and GERD, Celiac Disease, Crohn's Disease, Irritable Bowel Syndrome, Lactose Intolerance, Diverticulitis, Diverticulosis. * Diagnosis of any diseases such as cardiovascular disease, chronic kidney disease (CKD), gastrointestinal disorder, endocrinological disorder, immunological disorder, metabolic disease. * Consume more than the recommended alcohol guidelines i.e. \>21 alcohol units/week for males and \>14 units/week for females (europa.eu). * Current smoking habit or history of smoking within the past 1 year. * History of depression, schizophrenia, alcoholism, drug addiction, or mental illness. * Current or previous intake of contraceptives, female hormones, obesity drugs, absorption inhibitors, antidepressants, or appetite suppressants. * History of asthma or autoimmune disease Use of oral hormone therapies ie. cortisone or steroids in the 6 months prior to initiation of the study. * Abnormal liver function or abnormal renal function. * Blood pressure \>140/90 mmHg or hypertension with intake of a diuretic. * No participation to another clinical trial in the last 6 months. * No blood donation within a month. * Problems with overall findings in blood-test results as determined by a specialist. * Any condition judged by the investigator to be unsuitable for participation in the study.