TIAM

Pore Minimizing 21 Serum

For enlarged pores, oily skin, and blackhead-prone texture.

A genuinely high-active pore serum from TIAM — and one of the rare consumer skincare products with a niacinamide concentration most brands don't even attempt. The headline is 20% niacinamide. For context, most niacinamide serums on the market sit at 4–10%, and 5% is already considered "clinical-grade." This delivers four times that concentration, paired with 1% Zinc PCA (a sebum-regulating ingredient that limits acne-causing bacteria) and willow bark water (a natural source of BHA that gently lifts dead cells and clears pore congestion). Just 12 ingredients in total, TIAM's signature minimalist approach.

The brand's clinical study claims visible results in 21 days of daily use (hence the "21" in the name). The texture is lightweight, slightly viscous, watery rather than thick — absorbs cleanly without that draggy serum feel and layers nicely under SPF and makeup. Sodium hyaluronate hydrates, allantoin soothes, and the formula skips fragrance, alcohol, and all common allergens. Worth flagging: at 20%, this is genuinely powerful, so the brand recommends starting gradually — a patch test first, then 2–3 nights a week, building to daily as the skin adjusts.

Best For: Oily, combination, or blackhead-prone skin with visibly enlarged pores — also a great pick for anyone wanting to step up from a basic 5% niacinamide serum and address pores, sebum, and uneven tone in one product. Note: High niacinamide concentration; patch test first, introduce gradually.

Key Ingredients
Niacinamide (20%): One of the highest concentrations of niacinamide in any consumer skincare product — refines pores, regulates sebum, evens tone, and strengthens the barrier. Zinc PCA (1%): A clinically-recognised pair of zinc and L-PCA that regulates sebum production and limits acne-causing bacteria — works synergistically with niacinamide for pore care. Salix Alba (Willow) Bark Water: A natural source of salicylic acid (BHA) that gently lifts dead cells, clears pore congestion, and has a mild astringent effect on enlarged pores. Sodium Hyaluronate: A skin-identical humectant that pulls moisture into the skin — offsets any potential dryness from the high niacinamide concentration. Allantoin: A gentle soothing agent that calms reactive skin and supports recovery — essential for keeping a high-active formula tolerable for sensitive skin.
How to Use
After cleansing and toning, dispense a small amount onto your fingertips and pat gently across your face — focus on areas with visible pores or oily texture. Follow with moisturiser, and SPF in the morning (essential — high-active formulas make skin more sun-sensitive). Start by using 2–3 nights a week for the first two weeks, building gradually to daily use as your skin adjusts. Patch test first: Apply a small amount behind the ear or on the jawline for 24 hours before face application. Tip: Don't skip the gradual introduction. At 20%, the niacinamide is well above the standard "5% is plenty" benchmark, and even tolerant skin types can experience temporary purging or irritation if introduced too quickly. Two to three nights a week for the first fortnight is the sweet spot — by week three, most skin handles daily use comfortably and you'll start to see the brand's "21 day" results claim play out.
Full Ingredients

Water, Niacinamide, Butylene Glycol, 1,2-Hexanediol, Zinc PCA, Salix Alba (Willow) Bark Water, Sodium Hyaluronate, Allantoin, Glycerin, Ethyl Hexanediol, Polyglyceryl-10 Laurate, Polyglyceryl-10 Myristate

Volume — 40 ml
Pore Minimizing 21 Serum
$25.00
Taxes & duties included.
Free worldwide shipping over $60. Ships from Seoul in 3–4 business days.