Impact of Supplemental Fiber on Gut and Vascular Health Related in Obesity Phenotypes

Inclusion Criteria: * Participants are 18-55 years old. * Participants BMI is ≥30 kg/m2 - this BMI requirement is due to our research aims. * Participants have either 0-1 or 2+ of the following risk factors outside of the normal reference ranges: blood pressure, blood sugar, triglycerides, and HDL-cholesterol. * Participants are not pregnant or expecting to become pregnant (females only). •Participants are not postmenopausal (females only). * Participants have not been diagnosed with an advanced cardiometabolic condition (e.g., cardiovascular disease, type 2 diabetes). * Participants have not been diagnosed with a chronic inflammatory condition (e.g., rheumatoid arthritis, inflammatory bowel disease, diverticulosis/diverticulitis). * Participants do not regularly take anti-inflammatory drugs (more than 2x week) and are willing to suspend use of these medications for 3 days leading up to in-lab visits. * Participants do not take weight-loss medications (e.g., Ozempic, Wegovy). * Participants do not use tobacco products or any illicit drugs. * Participants have not used antibiotics or probiotics in the last month. * Participants do not have dietary restrictions prohibiting them from consuming the fiber supplement (e.g., food allergies/intolerance). * Participants do not have a pacemaker. * Participants are able to lie on their back (supine position) in the dark for at least 10 minutes (related to vascular measurements). Exclusion Criteria: * Participants are not 18-55 years old. * Participants BMI is not ≥30 kg/m2 - this BMI requirement is due to our research aims. * Participants do not have either 0-1 or 2+ of the following risk factors outside of the normal reference ranges: blood pressure, blood sugar, triglycerides, and HDL-cholesterol. * Participants are pregnant or expecting to become pregnant (females only). * Participants are postmenopausal (females only). * Participants have been diagnosed with an advanced cardiometabolic condition (e.g., cardiovascular disease, type 2 diabetes). * Participants have been diagnosed with a chronic inflammatory condition (e.g., rheumatoid arthritis, inflammatory bowel disease, diverticulosis/diverticulitis). •Participants regularly take anti-inflammatory drugs (more than 2x week) and are not willing to suspend use of these medications for 3 days leading up to in-lab visits. * Participants take weight-loss medications (e.g., Ozempic, Wegovy). * Participants use tobacco products or any illicit drugs. * Participants have used antibiotics or probiotics in the last month. * Participants have dietary restrictions prohibiting them from consuming the fiber supplement (e.g., food allergies/intolerance). * Participants have a pacemaker.