For those whose brightening care doesn't work — the real causes of dullness

You've been using a brightening serum daily. But your skin tone hasn't changed. "Is it not working, or is something wrong with me?"

The key: "dullness" is not one thing.

Five types of dullness

1. Melanin-type — UV-induced excess melanin. Brightening actives (vitamin C, arbutin) work.

2. Glycation-type — Sugar-protein bonding creates yellowing. Brightening actives don't help; diet changes needed.

3. Poor circulation-type — Reduced blood flow creates blue-gray tones. Exercise and niacinamide help.

4. Thickened stratum corneum-type — Slow turnover accumulates dead cells. AHA/BHA exfoliation needed.

5. Dehydration-type — Dryness disrupts texture causing uneven light reflection. Moisturizing first.

Why brightening products don't work

Most brightening products only address melanin-type. If your dullness is dehydration or circulation, melanin suppressors won't help. Different causes require different solutions.

What you can do today

1. Identify your dullness type — Yellowish = glycation. Blue-gray = circulation. Rough = thickened stratum corneum.

2. Match approach to type — Melanin type needs brightening. Dehydration type needs moisture first.

3. Sunscreen is universal — Every dullness type is worsened by UV.

Knowing your dullness type is the starting point for effective care.