Inclusion Criteria:  Males or females, ≥ 18 years of age at the time of signing the informed consent document. ≥5% of affected skin area Inactive, generalized vitiligo (inactive for a minimum of 6 months). [Inactive: No new spontaneous lesions or a rapid progression of these.] Subjects who have not been treated with phototherapy previously. Subject who have not been treated with topical corticosteroids for at least 8 weeks or immunomodulators for at least 12 weeks.  Exclusion Criteria:  Subjects with <5% of affected skin area Subjects who use multivitamins, diuretics, lipase-inhibitors (orlistat) Subjects with calcium disorders (for example: primary hyperparathyroidism) or patients with hepatic/kidney failure. Subjects with malabsorption gastrointestinal disorders Pregnant women or in lactation Subjects with cancer Subjects with previous history of skin cancer (melanoma/non-melanoma) Photo-sensible diseases (actinic dermatitis, porphyria, xeroderma pigmentosa) or drugs Subjects using immunomodulator o immunosuppressor treatments Subjects who practice activities that require prolonged sun exposure.