Serums are where a routine becomes personal. They are light, concentrated products made to target one or two concerns, so the right one depends on what you want to improve. Here is a quick guide to four ingredients you will see again and again.

Niacinamide: for oil, pores and uneven tone

Niacinamide (vitamin B3) helps balance oil, makes pores look less noticeable and supports the skin barrier. Over time it also helps with uneven skin tone, and most skin types tolerate it well. Try the COSRX The Niacinamide 15 Serum or the Anua Niacinamide 10% + TXA 4% Serum.

Vitamin C: for brightness and dull skin

Vitamin C is an antioxidant that helps brighten dull skin and fade the look of dark spots. It works well in the morning under sunscreen. Some forms can tingle on sensitive skin, so introduce it slowly. Try the COSRX The Vitamin C 23 Serum.

Centella asiatica: for calming redness

Centella, also called cica, is a plant extract known for soothing irritated, red or blemish-prone skin. It is a good choice when your skin feels sensitive or stressed. Try the SKIN1004 Madagascar Centella Ampoule.

Snail mucin: for hydration and glow

Snail mucin is a lightweight, hydrating ingredient that leaves skin feeling plump and smooth. It suits almost every skin type, including oily skin. Try the COSRX Advanced Snail 96 Mucin Power Essence.

Can you use more than one?

Yes. Most of these ingredients can be used in the same routine. If your skin is sensitive, a simple approach is vitamin C in the morning and niacinamide or centella at night. Apply from thinnest to thickest: serums go after cleansing and toner, and before moisturiser.

Introduce one product at a time

Start one new serum at a time and give it a few weeks before judging the results. Always patch test first, and stop using a product if it causes lasting irritation.

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