Inclusion Criteria for cases:  Filipino patients, aged 18-25 years old Diagnosis of acne vulgaris Able to read and write in English or Tagalog Seen at the dermatology out-patient department of East Avenue Medical Center  Exclusion Criteria for cases:  Patients with other chronic dermatoses or systemic disease Taking oral supplements or medications for the past 3 months Patients who are pregnant or lactating  Inclusion Criteria for controls:  Filipino patients, aged 18-25 years old Able to read and write in English or Tagalog Seen at the dermatology out-patient department of East Avenue Medical Center  Exclusion Criteria for controls:  Patients with acne vulgaris or other chronic dermatoses or systemic disease Taking oral supplements or medications for the past 3 months Patients who are pregnant or lactating