Vitamin D and Mood Study

INTERVENTION: Vitamin D oral capsule in six monthly doses of 50,000 IU. A blood sample will be taken at the beginning and end of study to confirm effectiveness of the dose in increasing serum 25(OH)D. To achieve adherence, participants take the first dose under supervision, and receive text reminders to take all other 5 doses with a request to confirm having taken the dose with a return text. At the end of the study, participants will be asked to return their supplement bottles with any remaining capsules. Participants will complete monthly online surveys on depression, wellbeing and moods. CONDITION: depression emotional wellbeing PRIMARY OUTCOME: differences in CESD scores as a measure of depressive symptomatology differences in positive and negative moods based on the mood circumplex SECONDARY OUTCOME: differences in psychological wellbeing measured through the Flourishing Scale INCLUSION CRITERIA: *Females aged 18‐40 years *Cell phone/internet access *Willingness to provide repeated blood sample