One fan shared a quote from Dr. Dennis Gross, saying, "Scrubs are a primitive way to exfoliate. it's like using sandpaper on your face."
Another even brought up text from the St. Ives lawsuit, which stated that "walnut shell powder creates microscopic tears in the top layer of skin."
Even Aestheticians got involved, writing about the side effects of using a walnut scrub on your face.
"Your skin may look great now," one wrote, "but the sensitivity & post inflammatory hyper-pigmentation will come eventually with consistent usage."
For effect, another fan shared photos of micro-tears they can cause:
As expected, the popular Beauty watchdog Estée Laundry weighed in on their Instagram account.
"#Laundrites, what are y'alls thoughts on #KylieSkin? So far we've yet to see an ingredient list yet but they've mentioned the face scrub includes walnut particles-a fancier version of the #StIves scrub?🤔 #AbrasiveAF #GlossierMuch #WheresTheTransparency," they wrote.
Interestingly, Kylie didn't even use the scrub in her promo video.