Satiety, Microbiome, Appetite Regulation, and Tracking Energy Across Targeted Snacks: Acute Postprandial Study

Inclusion Criteria: * Willing and able to follow the study protocol * Willing and able to provide informed consent * Regular consumption of snacks (≥2 per day) * Fibre intake \<20 g/d * Living in the UK Exclusion Criteria: * Have BMI of less than 18.5 kg/m² or more than 40 kg/m² * Have an allergy or intolerance to ingredients in the intervention or control snack bars (including inulin) or cannot eat the food products safely and comfortably for any reason * Have a personal medical history of inflammatory bowel disease, coeliac disease, Crohn's disease, irritable bowel syndrome, chronic constipation, or chronic diarrhoea * Have started a new supplement in the past month, or are unwilling to maintain current supplement use throughout the study * Previously purchased any ZOE products (including Daily30, ZOE gut health bar or ZOE app membership). * Have taken any medication or product that may modify the measured study outcomes, in the past 3 months (including but not limited to: fibre supplements, antibiotics, non-topical steroids or other immunosuppressive medicines, probiotics or prebiotics, metformin, GLP-1 receptor agonists, lipid-lowering medications such as fibrates, statins, PCSK9 inhibitors, non-steroidal anti-inflammatory drugs) * Have used opiate pain medication or a proton pump inhibitor for 8 or more consecutive days during the past 3 months * Have experienced a heart attack, stroke or major surgery in the last 2 months * Have received treatment for cancer in the last 3 months * Are currently pregnant, breastfeeding or planning a pregnancy * Are diagnosed with an eating disorder, type 1 diabetes mellitus or type 2 diabetes mellitus