Why do sultanas contain fats and oils?

Sultanas, which are dried grapes, naturally contain small amounts of fats and oils primarily due to the presence of the grape seeds and the skin. Additionally, during the drying process, some of the natural oils from the fruit can concentrate, contributing to the overall fat content. However, the fat content in sultanas is generally low compared to other food sources. These fats can contribute to the fruit's flavor and texture.