Olay retinol cream does not give quick results and usually requires several weeks of consistent use to show improvement. Using it only a few times will not produce visible changes, and skin darkening may occur due to irritation, acne inflammation, or inadequate sun protection. Adapnil Gel contains adapalene, a prescription medication that is more effective for treating acne and clogged pores. However, skin conditions vary from person to person, so it should be used only under a dermatologist’s guidance, as improper use can worsen irritation and pigmentation.