Five natural ingredients to never use on your skin and why

From burns to infections, these raw unaltered ingredients carry more risk outside a bottle.

Leave it to the internet to give us wild ideas on what to slather on our skin as the latest pore minimizer or pimple destroyer. Unfortunately not everything we see from beauty bloggers and Instagram influencers is sage advice.

You’ve likely seen some of these ingredients in store-bought products — but when used alone or without proper sanitation and diluting methods, they have the potential to damage skin, especially over time.

Think twice about DIY methods from your fridge and pantry. Just because something is natural or raw doesn’t mean it’s good for your skin.

We’ve debunked these ingredients that range from gritty to goopy to gross so that you don’t have to give them a test drive.

1. Egg whites

Oh how convenient it would be to make your morning omelet, slick a little raw egg on your face, and then go about your day with tightened pores and smooth skin. That’s the claim made by proponents of the egg white face mask.

Lowest-risk scenario: Any tightening benefits will wash down the drain when you rinse off the residue.

Most serious potential: A crack in the concept is that raw egg can be contaminated with Salmonella. By placing uncooked egg so close to your mouth, you run the risk of contracting a gastrointestinal tract infection.

A localized infection on the skin is also possible, and the danger is upped when applying to open wounds — like for instance if you’ve got a scratch from Kitty or a few healing blemishes.

Plus, the contaminant can hang around on surfaces for several hours, making your bathroom a health hazard.

However, contracting Salmonella from raw eggs is rare, especially if you’re using pasteurized eggs from the store rather than ones sourced straight from your backyard cluckers.

2. Lemon or lime juice

A squirt of lemon or lime juice on an acne scar, or any hyperpigmentation, is said to lighten the blemish.

Lowest-risk scenario: You’ll feel a sting and maybe reap the benefits of a little fruit juice exfoliation.

Most serious potential: The use of citrus fruits on the skin could leave you with bigger worries, like a second-degree burn.

The psoralens in lemons and limes can cause a phototoxic reaction on your skin when it’s exposed to UV light. That means your attempt to fade a red spot could result in a big blister.

The rash or burn, called phytophotodermatitis, often appears one to three days after you’ve gotten some sun — and it could last for months. Talk about the juice not being worth the squeeze!

3. Cinnamon

The “cinna-mask” gained notoriety after a beauty blogger, who goes by EnjoyPhoenix, extolled cinnamon’s purifying power. But this red spice may not play nice on your face.

Lowest-risk scenario: You’ll feel a tingling sensation and experience some redness.

Most serious potential: Several people who tried the cinnamon facial later posted about burns.

Although cinnamon does have some antimicrobial benefits and is used in wound healing, it’s also one of the more common spice allergies. And even if you don’t have a known allergy to cinnamon, you may still be hypersensitive to the spice on your skin or sustain a burn from cinnamon oil.

If you’re tempted to use cinnamon or any spice in a DIY mask, always do a patch test on a tiny spot in front of your earlobe.

4. Breast milk

Breast milk facials have become the rage at some spas in recent years to treat acne. Breast milk contains lactic and lauric acids, both of which have skin healing and antimicrobial benefits that some studies show have helped pimple-prone skin.

This information has prompted some folks to turn to their postpartum pals to pump a steady supply.

Lowest-risk scenario: You’ll notice a minimal reduction in irritation and sit there wondering why you have your besties’ breast milk on your face.

Most serious potential: Breast milk is a bodily fluid that can transfer disease, and improper collection or storage could invite a bacterial infection.

If you do head to the spa for a breast milk mask, ask about the facility’s supply source and its safety practices.

5.Apple cider vinegar

Apple cider vinegar (ACV) has been touted as the holy grail of DIY astringents. Users claim it helps clear acne, fade blemish scars or age spots, and even remove moles.

Lowest-risk scenario: Using ACV on your face will induce a stinging sensation and make you wince at the skunky smell. If ACV has saved your skin and you can’t use another option, dilute your ACV for safety.

Most serious potential: Long-term, undiluted ACV use could corrode your lovely face due to its highly acidic levels. Vinegar can be caustic if you leave it on your skin, and it shouldn’t be used to treat wounds.

Any acne sores are at risk for incurring a burn or major irritation. Plus, using ACV as a facial product puts your peepers at risk. If you get it in your eyes, you could experience inflammation or even a cornea burn.