Functional properties of grape (Vitis vinifera) seed extract and possible extraction techniques-A review

Grape (Vitis vinifera) member of family vitaceae, is an excellent source of phenolics, particulary in the skin and seeds. Phenolic compounds have attracted much interest recently, because they are potent antioxidant and exhibit various other physiological activities including anticarcinogenic, antimicrobial, anti-inflammatory and antihypertensive activities associated with reduced risk of chronic diseases like cardiovascular diseases. The method of processing and extraction play a vital role in the qualityofnutraceuticals extracted. Thetraditional extraction techniques aretime-consuming and require relatively large quantities of solvents. In view of increased awareness for health related compounds from plant materials, there is an increasing demand for better extraction techniques which are nontoxic, environmentally safe and inexpensive. This review paper discusses briefly on grape phenolics, important nutraceuticals extracted from grape seeds and its positive health effects. The possibility of application of novel extraction methods like sonication assisted extraction, microwave assisted extraction techniques and supercritical fluid extractions for efficient extraction of plant are discussed.