Comparison of Dairy and Plant-based Alternatives in Adolescents and Older Adults

Inclusion Criteria: * Age 14-18 years old (adolescents) or 60-75 years old (older adults) * BMI z-score \>+1SD, \<+2SD (adolescents) or BMI 25-30 kg/m2 (older adults) * Willing to maintain habitual diet, physical activity pattern, and body weight throughout the study. * Willing to maintain current dietary supplement use throughout the study. On study visit days, subject agrees not to take any supplements until dismissal from the Nutrition Intervention Center. * Willing to abstain from alcohol consumption for 24hrs prior to all study visits. * Willing to avoid vigorous physical activity for 24hrs prior to all study visits. * Willing to refrain from cannabis use throughout the entire duration of the study. * Willing to refrain from protein supplement use (e.g. protein powder) throughout the entire duration of the study. * Understands the study procedures, provides informed consent to participate in the study, and authorizes release of relevant protected health information to the study investigator. Exclusion Criteria: * Smoking * Thyroid problems * Lactose intolerance and/or allergies, intolerances, or sensitivities to study treatments * Previous history of cardiovascular disease, diabetes, liver or kidney disease, inflammatory bowel disease, celiac disease, short bowel syndrome, malabsorptive syndrome, pancreatitis, gallbladder or biliary disease * Presence of gastrointestinal disorder or surgeries within the past year. * Inability to comply with the experimental procedures and follow our safety guidelines * Regular breakfast skipping (\>3 days a week) * On a special diet (e.g. ketogenic, Atkins, high protein) or restrained eaters as identified by a score of \>20 on the Eating Attitudes Questionnaire * Difficulties with eating or swallowing * Fasting blood glucose \>5.6mmol/L measured at screening * Uncontrolled hypertension (systolic blood pressure \>120mmHg, diastolic blood pressure \>80mmHg) as defined by the average blood pressure measured at screening * Weight gain or loss of \>10lbs in previous three months * Consuming prescription or non-prescription drug, herbal or nutritional supplements known to affect outcome of the study as per investigator's judgement