First, the font on the real ysl lipstick logo is a little longer than the fake ysl font.
Second, the real ysl lipstick is the fragrance of flowers and the taste of fruits, but it is not fake.
Third, the true and false ysl lipstick can be seen from the color, and the real color looks brighter.
Fourth, the colors, fonts, numbers, bar codes and QR codes on real ysl lipsticks are different.
Fifth, the real ysl lipstick is a little heavier than the fake one, and the outer packaging is not so fine.
Reference: Saint Laurent official website-Anti-counterfeiting Inquiry