Pigmentation is the most-requested concern in our Canadian customer emails after barrier damage. It is also the concern most stubbornly resistant to wishful thinking. Dark spots, melasma patches, and post-inflammatory hyperpigmentation do not fade in three weeks. They fade in three to six months with a well-stacked routine and enough sunscreen that you feel slightly ridiculous.

Korean dermatology has been working on this problem for a long time. The result is a three-ingredient stack that is consistent across Seoul clinic recommendations, and that we think is the best at-home approach available without a prescription.

Know which pigmentation you are dealing with

Not all dark spots are the same process. Three main types show up in our inbox.

Post-inflammatory hyperpigmentation (PIH). These are the marks left behind after acne, bug bites, or irritation. They are melanin deposits produced during the healing response. They are the easiest to fade.

Sun-induced lentigines. The flat brown spots that appear on cheekbones and the backs of hands after years of cumulative sun. They are melanin concentrated around damaged keratinocytes.

Melasma. The patchy, symmetric pigmentation that appears on the upper lip, forehead, and cheeks. Often triggered by pregnancy, hormonal contraception, or heat exposure. This is the most stubborn, most likely to rebound, and where tranexamic acid earns its place.

The three-ingredient stack works on all three, but the weighting shifts. PIH responds fastest to niacinamide and vitamin C. Melasma needs tranexamic acid in the mix. Sun spots need all three plus aggressive UV blocking.

Ingredient one: vitamin C (the blocker)

Vitamin C inhibits tyrosinase, the enzyme that makes melanin from tyrosine. Block the enzyme, slow the production. This is the front-of-the-funnel approach.

The research-backed form is L-ascorbic acid, which is unstable in water and needs an acidic pH of around 3.5 to work. Korean brands often use more stable derivatives - sodium ascorbyl phosphate, ethyl ascorbic acid, magnesium ascorbyl phosphate. The derivatives are gentler, more stable, and convert to L-ascorbic acid in the skin at different rates. The trade-off is potency.

Vitamin C: an antioxidant that blocks melanin synthesis by inhibiting the tyrosinase enzyme. Works best at 10-20% as L-ascorbic acid, or 5-10% as a stable derivative. See full entry.

For Canadians who struggle with vitamin C irritation in winter, a derivative like 5 percent ethyl ascorbic acid is a saner entry point. For more on choosing, see our vitamin C serum comparison.

Ingredient two: niacinamide (the transport interruptor)

Once melanin is produced, it travels from melanocytes to surrounding keratinocytes via cellular structures called melanosomes. Niacinamide blocks this transfer. The melanin stays where it was made, deeper in the skin, and does not accumulate at the visible surface.

Niacinamide at 4 to 5 percent is the standard effective range. Korean formulations often go higher, up to 10 percent. We do not see clinical evidence that 10 percent meaningfully outperforms 5, and at 10 percent some skin types develop a temporary red flushing response. Start at 5.

Niacinamide: a form of vitamin B3 that blocks melanin transport from melanocytes to keratinocytes, calms redness, and supports barrier function. See full entry.

Ingredient three: tranexamic acid (the inflammation interruptor)

Tranexamic acid is the newest member of the stack and arguably the most interesting. It is not technically an acid in the exfoliating sense - it is a synthetic derivative of the amino acid lysine, originally used as a systemic medication to stop heavy menstrual bleeding.

Its skincare application came from a happy accident. Patients taking oral tranexamic acid for menorrhagia noticed their melasma improved. Researchers investigated, and the mechanism turned out to be inhibition of the plasmin pathway that amplifies melanin production during inflammation.

For melasma specifically, tranexamic acid is the best over-the-counter ingredient currently available. We have a full deep-dive coming soon in tranexamic acid: the lesser-known brightening hero.

Tranexamic Acid: a synthetic amino acid derivative that inhibits the inflammation-driven melanin pathway, particularly effective for melasma. See full entry.

The stack: how to layer all three

Morning: vitamin C serum first (after toner, before moisturizer). Niacinamide can be in the same serum or in your moisturizer. Sunscreen always last, broad-spectrum, SPF 50, PA++++.

Evening: tranexamic acid serum in place of the vitamin C. Niacinamide again. Moisturizer.

If you cannot find a tranexamic acid serum in Canada, a niacinamide plus tranexamic acid combination serum is widely available from Korean brands at around $30 CAD and does the work of two products.

The non-negotiable: sunscreen

Every other ingredient in this stack is waving a flag at a wave of melanin that your skin is producing in response to UV. If the UV keeps coming, the melanin keeps being produced, and your fading routine is running on a treadmill.

Canadian winter UV is higher than most people think - cloud cover reduces UV by only 20 to 30 percent, and fresh snow reflects 80 percent of UV back up at your face. Sunscreen in February is not optional. Our 2025 Korean sunscreen guide has current picks.

Timeline expectations

PIH from recent acne: 6 to 12 weeks of consistent routine.

Sun spots: 3 to 6 months with sunscreen as the load-bearing factor.

Melasma: 3 to 6 months, and you should assume you are managing it long-term rather than curing it. Heat, hormones, and UV will trigger rebound if you stop the routine.

Anyone promising faster results is either selling you an unregulated hydroquinone formulation (illegal over-the-counter in Canada at clinical strengths) or exaggerating results. Professional treatments like IPL, fractional laser, and prescription hydroquinone from a Canadian dermatologist can accelerate the timeline, but they still need the ingredient stack underneath to consolidate results.

Exfoliation: yes, but carefully

A low-strength AHA or PHA can accelerate surface cell turnover and help the brightening actives penetrate. Twice weekly is plenty. More than that and you risk triggering the exact inflammatory response that drives PIH and melasma in the first place.

Chemical exfoliants should be in your evening routine, on non-tranexamic-acid nights. The stack is already working on layered mechanisms - you do not need to pile a fourth onto the same face at the same time.

The K-beauty edge

Korean brands formulate brightening products at the intersection of high actives and high tolerability. Western brightening products often max out one ingredient at high concentration. Korean brands more commonly use three or four brightening ingredients at moderate concentrations in the same serum. In most cases, the layered moderate approach wins for sensitive or winter-compromised skin.

Bottom line

Vitamin C in the morning, tranexamic acid in the evening, niacinamide across both, and sunscreen as the non-negotiable foundation. Three to six months of consistency. No shortcuts, no miracles, no trendy extract of the week. This is the routine Gangnam derms recommend because it is the routine that works.