New delivery systems to improve the bioavailability of resveratrol
Authors: Santos, Ana Clááudia; Veiga, Francisco; Ribeiro, Antóónio J
Source: Expert Opinion on Drug Delivery, Volume 8, Number 8, August 2011 , pp. 973-990(18)
Publisher: Informa Healthcare
Abstract:Introduction: Resveratrol (RSV) has been one of the most extensively studied polyphenols in the last 10 years, owing to its numerous and potent therapeutic activities, namely its high antioxidant properties. However, RSV's bioavailability is compromised by its physicochemical properties, such as low stability, increased oxidation on heat and light exposure, low water solubility and also its high hepatic uptake. Moreover, results obtained in human pharmacokinetic studies have shown a low amount of intact RSV in the systemic circulation, which does not justify its therapeutic activities, raising doubts about RSV's potential. RSV is already available as a nutritional supplement, although its translation to the clinic is not straightforward, owing to the lack of clinical data. Areas covered: In this review, formulations that are being used for delivery of RSV are discussed. New delivery systems are presented as valid alternatives to circumvent the limitations of the physicochemical characteristics and pharmacokinetics of RSV. In this way, they are compared with classical formulations with regard to improving RSV protection and bioavailability. Expert opinion: Despite promising results in preclinical settings, the applicability of RSV to humans has met with only limited success, largely owing to its inefficient systemic delivery and consequently its low bioavailability. To achieve an optimal response of RSV, new strategies are still required to enhance its bioavailability and reduce its perceived toxicity.
Document Type: Research article
Affiliations: 1: Centro de Estudos Farmacêêuticos, Faculty of Pharmacy, University of Coimbra, Póólo das Ciêências da Saúúde, Azinhaga de Santa Comba, 3000 548 Coimbra, Portugal ++351 239 488 400;, Email: email@example.com
Publication date: 2011-08-01