Adult HMO Supplementation and the Gut Microbiome

Inclusion Criteria: * Participants are between the ages of 18 and 40. Exclusion Criteria: * Participants cannot have taken prebiotic or probiotic supplements within 6 months of starting study. This includes prebiotic or probiotic powder or supplements with prebiotic or probiotic addition or multivitamin with probiotic addition. This does not include food with live probiotics in it like yogurt or kefir. * Participants must not be pregnant or breastfeeding or trying to conceive within the study period. * Participants must be residents of the United States with US postal service. * Participants cannot have the following existing health conditions: * Pre-existing gut conditions (IBD, Celiac's disease, Crohn's disease, SIBO) * Immune or auto-immune conditions (Type 1 Diabetes, human immunodeficiency virus (HIV)) * Participants cannot be lactose intolerant or have an allergy to dairy products. * Participants are excluded if they have received results from an at home microbiome stool test in the past 6 months. This does not include clinical workup such as culture or pathogen testing. * Participants must agree not to take another prebiotic or probiotic supplement or an at-home test over the study period. * Participants must have no known major dietary changes upcoming.