I haven't noticed any difference in the firmness, and appearance of stretch marks on my skin; but even so, I can't get enough of this body oil. My skin is left silky smooth, and soft as a baby's bottom, without feeling greasy ( which is what I hated about Bio Oil). I swear by Nivea, and this just showed me once again why. This body oil works wonders, and I will be repurchasing as soon as I run out.