Expert opinions from Advanced Dermatology generally indicate that Bio-Oil may be moderately effective if used regularly over a period of time, but that it is not a substitute for professional treatments. Bio-Oil is an over-the-counter skincare product intended to reduce the appearance of scars and blemishes.
According to Advanced Dermatology, Bio-Oil is made from natural, safe ingredients; therefore, it should not clog pores or worsen existing acne or dark spots. Bio-Oil may help with dry skin but it does not address the underlying causes of dark spots.
Some customer reviews on Acne.org indicate that the product may be somewhat effective when used continuously for several months.