The Effects of the Bile Acid Supplement, 7-keto Lithocholic Acid, on Human Gut Microbiota and Risk Factors for Disease.

Inclusion Criteria: * Volunteer is healthy (good physical and mental condition, disease-free, with haemoglobin levels between 138 - 172 g/L for male and between 121 and 151 g/L for female) at the time of pre-examination * Volunteer is aged ≥ 18 to ≤ 65 years for the duration of the study * Volunteer is able and willing to comply with the study instructions * Volunteer is suitable for participation in the study according to the investigator/study personnel * Volunteer is able to give informed consent * Volunteer must be following a non-restrictive diet according to the investigator/study personnel (no vegan, keto or fasting diets) * Volunteer has not consumed pro- or prebiotic supplements or food products for a minimum of 4 weeks prior to starting the intervention. * Volunteer has no gastrointestinal disorders Exclusion Criteria: * No command of any local language * Gastrointestinal disorders including IBS, IBD or other conditions that might affect the gut environment * Food allergies or intolerances * Using drugs (e.g. antibiotics) influencing gastrointestinal function (12 weeks before intervention) * Use of laxatives * Clinically significant diabetes (plasma glucose test, fasting blood glucose \> 6.5 mmol/l (120 mg/dL) * Volunteers currently involved or will be involved in another clinical/ food study for the duration of this study * History of drug (pharmaceutical or recreational) or alcohol abuse. * If participants are pregnant or are lactating * Regular intake of probiotic or prebiotic supplements * Smoker * Those who follow extreme diets (Keto-diet, Atkins diet, vegan) * Those taking prescribed medication for existing health condition(s) * Those with a pacemaker