Food Frequency Questionnaires in Estimating Food Nutrient Intake in Healthy Young Adults

Inclusion Criteria: * Be literate and able to understand English * Have a body mass index (BMI) between 18.5 and 30 kg/m\^2; this represents the lowest end of the healthy BMI range and the upper limit of the overweight BMI range for our target age range * Be a non-smoker (defined as adults who have never smoked or who have not had a cigarette in the past ten years) * Not currently be taking any vitamins, minerals, or dietary supplements (or agree to discontinue use for the duration of the study) and agree to consume a standardized daily multivitamin for the remainder of the study (CVS One Daily) * Voluntarily agree to participate and sign an informed consent document * Agree to three separate blood draws * Agree to three separate spectroscopy scans to assess skin carotenoid levels * Agree to complete three separate 3-day diet records, three separate 3-day activity records, and one habitual physical activity questionnaire Exclusion Criteria: * Have an active metabolic or digestive illness, including malabsorptive disorders, renal insufficiency, hepatic insufficiency, hyper- or hypothyroidism, cachexia, morbid obesity, or short bowel syndrome * Have an active or a recent history of any condition that causes altered immunity, such as chronic inflammatory disease, autoimmune disorders, cancer, anemia, and blood dyscrasias * Are heavy alcohol consumers (defined as an average consumption of greater than 2 drinks/day)