Extrait de parfum and Eau de parfum are both types of concentrated fragrances, but they differ in their composition and concentration levels. Extrait de parfum is the most concentrated form of fragrance, typically containing between 20-40% fragrance concentration, and sometimes even higher. This makes the scent even more potent and longer-lasting than Eau de parfum, which typically contains between 15-25% fragrance concentration. A higher perfume oil concentration means an increased performance of the fragrance. Eau de toilette, Eau de cologne, and Eau fraiche are less concentrated than Eau de parfum and Extrait de parfum. Fragrances with a higher fragrance concentration contain more perfume oils and less alcohol, and vice-versa. A higher concentration of perfume oils means a more intense and long-lasting fragrance experience. However, synthetic fragrance ingredients can be harmful, and some have been associated with serious negative health effects