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"New perspectives in the pharmacological potential of naringin in medicine".

BACKGROUND
Naringin (NAR) is a flavonoid enriched in several medicinal plants and fruits. An increasing interest in this molecule has been emerging because it has the potential to contribute to alleviating many health problems.


OBJECTIVE
This review briefly describes the NAR pharmacokinetics and it mainly focus on in vitro and in vivo animal studies showing NAR beneficial effects on cardiovascular, metabolic, neurological and pulmonary disorders and cancer. The anabolic effects of NAR on different models of bone and dental diseases are also analyzed. In addition, the evidence of the NAR action on the gastrointestinal tract is reported as well as its influence on the microbiota composition and activity. Finally, current research on NAR formulations and clinical applications are discussed.


METHODS
The PubMed database was searched until 2019, using the keywords NAR, naringenin, cardiovascular and metabolic disorders, neurological and pulmonary disorders, cancer, bone and dental diseases, gastrointestinal tract, microbiota, NAR formulations, clinical trials.


RESULTS
The number of studies related to the bioavailability and pharmacokinetics of NAR is limited. Positive effects of NAR have been reported on cardiovascular diseases, type 2 Diabetes mellitus (T2DM), metabolic syndrome, pulmonary disorders, neurodegenerative diseases, cancer and gastrointestinal pathologies. Current NAR formulations seem to improve its bioavailability, which would allow its clinical application.


CONCLUSION
NAR is endowed with broad biological effects that could improve human health. Since a scarce number of clinical studies have been performed, the use of them requires more investigation in order to know better their safety, efficacy, delivery and bioavailability in humans.