By now you’ve probably seen the viral morning routine of fitness influencer Ashton Hall. Chief among our questions: What does rubbing a banana peel on your face do?

In the video, which has racked up over 100 million views on TikTok, Hall documents his rigorous morning routine, starting at 3:52 in the morning. For roughly the next six hours, Hall engages in intense workouts and, as some critics online have pointed out, unusual behavior, such as rinsing his teeth and dunking his head with bottled Saratoga water and applying a leftover banana peel to his skin. We’ve heard of using a banana peel to whiten teeth, but Hall’s skin care hack is clearly not as common, with banana memes taking over the internet the past week.

While we can’t comment on the potential benefits of Saratoga water, we asked board-certified dermatologist Joshua Zeichner, MD, to share his thoughts about using a banana peel for skin care. According to Zeichner, banana peels contain vitamin C, which is a common skin care ingredient.

“Vitamin C is a potent antioxidant that protects the skin against free radical damage,” says Zeichner. “It also interferes with production of abnormal pigmentation, so it can help brighten the skin.”

But before you dig through the trash for this morning’s leftover banana peel, Zeichner says this skin care hack isn’t all it’s hyped up to be. What does rubbing a banana peel on your face do? It turns out, not much.

“While vitamin C may be found in banana peels, it is unlikely that it will be at high enough concentration in the peel or through the skin to any significant degree when the peels are left to sit on the skin, even for an extended period of time,” says Zeichner.

In fact, board-certified dermatologist Kiran Mian, MD, cautions that using a banana peel on skin can actually have a negative effect. “Banana peels can have pesticides or microbes that can cause reactions on the skin like irritation,” she says. “There is limited absorption and bioavailability of the antioxidants when using a banana peel as delivery into the skin. Skin care products containing these beneficial ingredients will give you similar results without the potential for infection or irritation.”

Instead, try penciling in a trip to Sephora or Ulta for real results. “Vitamin C serums are much more effective as they are formulated with high concentrations of stabilized forms of vitamin C to ensure that they actually penetrate into the skin,” Dr. Zeichner says.

Dr. Mian agrees, adding that most at-home skin care hacks are usually more trouble than they’re worth. “I would avoid this skin care trend altogether, as I have seen granulomatous rosacea and other difficult-to-treat skin care conditions develop from patients applying ‘natural’ and edible things to their face,” she says. Instead, Dr. Mian recommends incorporating these foods into your diet to obtain their benefits.