Is it permissible to sell anti-aging creams that remove wrinkles, especially if the buyer is an unveiled woman? And are these creams considered cosmetics?

There is no harm for a woman in using creams and ointments to remove or reduce wrinkles, because the religious texts do not prohibit that. The women of the Companions used to use "wars" (turmeric or a similar plant) to remove melasma and improve their skin, which is similar to modern cosmetics. This is not considered the forbidden alteration of creation, as these substances do not cause permanent change. What is temporary, like kohl and henna, is excluded from the prohibition. It is permissible to use these creams, whether for treatment, prevention, or to maintain skin freshness, provided they do not cause harm.