Try: The Ordinary EUK 134 0.1%, $8.80

If you live in a metropolitan area, you should make sure to add some pollution protection to your routine. Most antioxidant-rich products keep you protected, but if you want to step things up a notch, consider giving this serum out for a spin: It contains EUK 134, a high-performing antioxidant that helps fight free radical damage. It can be used layered in with your other products or even mixed in to help boost their efficacy.

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Try: Paula's Choice Peptide Booster, $52

Collagen is a protein that's vital to keeping your skin's texture firm. And you know what helps boost collagen production? Peptides are the building blocks of proteins like collagen, so a booster like this is a great pick for firming your complexion.

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Try: Blossom Jeju Pink Camellia Blooming Vitamin Radiance Booster, $50

This adorable K-beauty booster is packed with Vitamin B3 (aka niacinamide), which is an ingredient that's known for its skin-brightening (and texture-smoothing) properties.

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Try: Dermalogica Barrier Defense Booster, $75

A weakened skin barrier leads to increased sensitivity and inflammation — which is why you want to make sure it stays strong. This potent blend of oils is so nourishing and soothing — and great for keeping your skin barrier healthy.

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