Yeah, in skincare "adjuvant" usually means something that mitigates side effects of another skincare product or medication. Or something that helps a skincare product or medication work better.

Most likely when it comes to tretinoin they're talking about using a moisturizer with tretinoin so it absorbs better and you have less dryness from it. That's my guess. But for sure ask your doc or whoever gave you the tretinoin what they want you to do.

Posted by: @Dan

Yeah, in skincare "adjuvant" usually means something that mitigates side effects of another skincare product or medication. Or something that helps a skincare product or medication work better.

Most likely when it comes to tretinoin they're talking about using a moisturizer with tretinoin so it absorbs better and you have less dryness from it. That's my guess. But for sure ask your doc or whoever gave you the tretinoin what they want you to do.

Thanks for your reply, actually the tretinoin was just an example. So do you think it can also be applied on top of the main treatment? my main doubt was precisely this; or whether to use, in certain cases, two cosmetic products together, one on top of the other.

Sometimes it's common practice to use two things on top of each other. Often people use tretinoin alongside moisturizer, sometimes before, and sometimes after.

However, if it's a prescription, as your doc.

@dan thank you very much, very kind!