Bioequivalence Study on Vitamin D in Healthy Adults

Inclusion Criteria: * Female participants not of childbearing potential (hysterectomy, oophorectomy, bilateral tubal ligation, postmenopausal) or females of childbearing potential that agree to use a medically approved method of birth control including hormonal contraceptives, double-barrier, non-hormonal intrauterine devices, non-heterosexual lifestyle or agrees to use contraception if planning on changing to heterosexual partner(s) and/or vasectomy of partner * BMI 18.5 to 29.9 kg/m2 * Agrees to maintain current level of physical activity throughout the study * Agrees to wear sunblock of at least SPF 45 during the study and not to have excessive sun exposure (no more than 1 hour without sunblock) Exclusion Criteria: * Women who are pregnant to be determined by UPT (uterine pregnancy test), breastfeeding, or planning to become pregnant during the course of the study * Duodenal ulcer or gastric ulcer, gastritis, hiatus hernia, or GERD within the past 3 months * Significant gastrointestinal disease, history of malabsorption, or history of irritable bowel syndrome and related disorders * Unstable medical conditions as determined by the principal investigator * Clinically significant abnormal laboratory results on CBC or BMP at screening * Cancer chemotherapy/radiation treatment within the 3 months prior to enrollment * Metabolic disease * History of kidney stones * Use of prescription or over the counter products known to interact with vitamin D within 72 hours of randomization and during the trial such as aspirin and NSAIDs, aluminum, iron and proton pump inhibitors * Use of acute over the counter medication within 72 hours of test product dosing * Smokers * Consumption of more than 2 alcoholic drinks per day * Drug abuse within the past year * Use of medicinal marijuana * Immunocompromised individuals such as individuals that have undergone organ transplantation or individuals diagnosed with HIV (human immunodeficiency virus) * Use of St. John's wort in the last 30 days before randomization and during the study * Use of vitamin D, multivitamins containing vitamin D, foods or beverages fortified with vitamin D and other natural health products containing vitamin D, or consumption of grapefruit/ grapefruit juice within 14 days of randomization and during the study * Use of anticoagulants, barbiturates, tetracycline antibiotics, beta-blockers, cyclosporine, prednisone, tricyclic antidepressants, diuretics and nitrate medications * History of blood/bleeding disorders * Anemia of any etiology defined as hemoglobin \< 140 g/L for males and \< 123 g/L for females * Blood donation in the past 3 months, or individual planning to donate blood during the study or within 30 days of completion of study * Participation in a clinical research trial within 30 days prior to randomization * Allergy or sensitivity to any ingredient in supplements provided during the study * Individuals who are cognitively impaired and/or who are unable to give informed consent