Yves Saint Laurent has several perfumes, including Y Eau de Parfum and Libre Eau de Parfum. The ingredients for Y Eau de Parfum include alcohol, parfum/fragrance, aqua/water, limonene, linalool, butyl methoxydibenzoylmethane, citral, citronellol, and alpha-isomethyl ionone. The ingredients for Libre Eau de Parfum include fragrance with 22 ingredients, including alcohol, linalool, and citronellol. Yves Saint Laurent also has a mens perfume called Lhomme Yves Saint Laurent, which includes alcohol, aqua/water, parfum/fragrance, ethylhexyl methoxycinnamate, limonene, butyl methoxydibenzoylmethane, and butylphenyl methylpropional.

There is no information on the positive or negative aspects of these perfumes in the search results. However, it is worth noting that Yves Saint Laurent claims to use quality ingredients that comply with strict regulations and have been subject to rigorous scientific evaluation of their safety by internal and independent experts.

It is also worth noting that fragrances can cause allergies and sensitivities on the skin, and some ingredients that are known EU allergens include linalool and citronellol. Additionally, fragrances may contain synthetic fragrances or essential oils that can cause sensitivities, and the term "fragrance" is not regulated in many countries.