While a good rule of thumb is 28 days, this differs largely from person to person and from product to product. Moreover, while some products may seemingly produce instant results, it may be superficial and temporary. Long-term changes like reducing acne and lightening hyperpigmentation usually take some time.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.