Abstract

We have already published a review about the results of clinical trials evaluating the effects of selected nutraceuticals on glycemia in humans. In this second part, we describe the role of other nutraceuticals involved in dysglycemia. The available evidence showed promising hypoglycemic effects of the nutraceuticals reviewed both for their efficacy and safety profile. However, contradictory results as regard the efficacy of some supplements such as Allium sativum, Juglans regia, and Lycium barbarum on glucose homeostasis have emerged from some clinical studies. Other nutraceuticals including Aloe vera, Amorphophallus Konjac, Bauhinia forficata, Coccinia, Ganoderma lucidum, Ipomoea batatas, and Lupinus mutabilis require larger and long-term studies rigorously designed to confirm their hypoglycemic effects due to the scarce data available and the poor quality of clinical trials. Further studies are also required for Cinnamomum, Cynara scolymus, Momordica charantia, Olea europaea, and Opuntia streptacantha. Moreover, well-designed large and long-term clinical trials including the use of standardized nutraceutical preparations are necessary for Phaseolus vulgaris and Vaccinium myrtillus.

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