Diabetic foot ulcers remain difficult to heal and nutritional supplementation may be an important complementary therapeutic measure. However, we need to clarify many issues before such supplementation is more widely used. Indeed, improvements are needed in the following areas: evaluation of nutritional inadequacy, completion of randomized controlled trials, understanding of patient and ulcer characteristics that favor response to nutritional supplementation, optimal duration of supplementation therapy, and evaluation of patient adherence. The challenge is now to acquire more knowledge in the aforementioned areas.
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