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Its always best to see a dermatologist immediately if you experience any kind of reaction."

“For makeup, I always follow what the time frame is in the symbol.

Array of luxury makeup products and candle on sink

Unsplash / Design by Zackary Angeline

The worst possible thing would be to use an old, oxidized foundation.”

So how do you know when to toss that foundation or mascara?

Separation or changes in texture along with foul smells are dead giveaways the product has gone bad.

The Shelf Life of Makeup

Elnora Turner / Byrdie

Keep reading to learn themakeup expirationdates for every kind of cosmetic, from blush to eyeliner and beyond.

Instead, gently drip the formula onto the back of your hand before you apply.

“Lotions with a pump are generally safer and less likely to be contaminated.

Charlotte Tilbury Airbrush Flawless Longwear Foundation

If you notice your foundation starting to separate, its definitely time to toss it.

Concealer

Maintenance Tips:Similar to foundation, concealer can last up to a year.

Always, always keep your brushes clean!

High Beam Liquid Face Highlighter High Beam 0.33 oz/ 10 mL

Byrdie Tip

Always use clean hands when applying any product to help keep the tubes and pots germ-free.

Keep your liners away from your steamy bathroom to extend their life.

And, of course, dont ever share mascara, as it can cause cross contamination.

Tarte Shape Tape Concealor

The more moisture the product hasor the closer it comes to your eyesthe shorter its life span.

Max out your perfumes shelf life by keeping your scents out of direct sunlight.

(Some brands, like Le Labo, even suggest storing them in the fridge.)

MAC

There are also tricks to help youextend the life of polish that has gone goopy.

Unlikebrushes, makeup sponges build up bacteria quicklyeven with regular washes and care.

Clinique Chubby Stick Cheek Colour Balm

Nars Lipstick

Lancôme Le Crayon Khôl Smoky Eyeliner

Maybelline Volum' Express the Falsies Mascara

Eyeko Skinny Liquid Eyeliner

Anastasia Beverly Hills Eyeshadow Single

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Chanel No. 5 Eau de Parfum

JINsoon Nail Lacquer

Beautyblender Original Beautyblender