Therefore, GP has potential as a bioactive food ingredient which can also increase the profits for grape growers while acting as a value-adding by-product of wine production. The exploration of ways of incorporating these by-products as a health-food ingredient in the human diet could provide many health benefits. Because cereal-based products have been, and still are, a central constituent in the diets of most populations, the use of such products supplemented with various nutritious, protective, and ballast substances may be appropriate. However, utilisation of GP in biscuits is very limited, and no accurate information is available on the effect of GP on the quality of bakery products, such as muffins.