Bio-Oil has a way around this. The formula utilizes Purcellin oil, a breakthrough ingredient that reduces the thickness of the oil and helps it absorb quickly into the skin.

Look, if Bio-Oil really does for the skin all that people say it can do— fade acne scars, even skin tone, and improve stretch marks—I’d say dip me in a vat of the body oil and fry me up.

The watery part of the bio-oil is essentially the same thing as liquid smoke, an ingredient used to give barbecue sauce and other foods a smokey flavor, according to Charm CEO and co-founder Peter ...