Grapefruit Soap Grapefruit Soap Ingredient Label Grapefruit Soap (5 ratings) £4.50 Quantity: at £4.50 each Add To Basket 1 in stock. Grapefruit soap is made with natural ingredients with citrus zesty fragrance. This is a beautiful scent which has been asked for many times and lovely for the summer. This soap is scented with grapefruit essential oil. The ingredient label is attached to the photo.