Resumo

JESUS, Alison de. Vitamin D levels after Gastric bypass: Implications and Recommendations. Acta Port Nutr [online]. 2016, n.6, pp.42-45. ISSN 2183-5985.  https://doi.org/10.21011/apn.2016.0608.

Obesity is a public health problem that increases year after year with the consequent growth in the number of bariatric surgeries. Among the various techniques, Roux-en-Y gastric bypass is the most common worldwide. In addition to promoting long-term weight loss and resolution of comorbidities such as type II Diabetes Mellitus, Hypertension and Sleep Apnea, it can lead to implications such as nutritional deficits. The relationship between obesity and low levels of vitamin D (25(OH)D) has been observed but its causality is not well defined. The literature shows contradictory findings with regard to the definition of the deficiency’s level of 25(OH)D and about the optimal dose of supplementation before and after a gastric bypass. Absorption of vitamin D in normal physiological situations is well defined, the same doesn’t apply after a gastric bypass, in which the impact of surgery in serum 25(OH)D is not yet well defined. Since vitamin D has shown an important role, not only in bone function but also in immune and cell function, additional research is needed with more randomized controlled trials to develop evidence-based guidelines to prevent and treat vitamin D deficiency in obese subjects, before and after a gastric bypass, through safe sun exposure, diet and supplementation.

Palavras-chave : Gastric bypass; Vitamin D deficiency; Sun exposure; Obesity; Vitamin D supplementation.

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