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Vitamin D deficiency has been described in many diseases and indeed in the general population. However fewer reports have been published in young and healthy people. Vitamin D deficiency should not be found in medical students of the Canary Islands, because they have all the resources to avoid it.To estimate the prevalence of vitamin D deficiency in a population of medical students of both gender from the University of Las Palmas de Gran Canaria.103 medical students of both genders from the University of Las Palmas de Gran Canaria. They completed a questionnaire and a physical examination. Vitamin D (25- hydroxycholecalciferol [25-HCC]), parathyroid hormone, biochemical markers of bone remodeling and a general biochemical study were performed. Bone mineral density was assessed by dual energy X-ray absorptiometry at the lumbar spine and the proximal femur. Quantitative ultrasounds parameters were measured at the calcaneus.Only 38.8% of the students of Medicine (42.1% of males and 44.9% of females) have 25-HCC values higher than 30 ng/dl as widely recommended nowadays. Vitamin D deficiency (20 ng/ml) is observed in 32.6% and vitamin D insufficiency (30 ng/ml) in 28.6% of the students of Medicine in Las Palmas de Gran Canaria.Although they have optimal conditions for having good levels of vitamin D, near two thirds of the medical students in the Canaries have low values of vitamin D.