Question 1

Can I use Mandelic Acid and BHA (Salicylic) together?

Accepted Answer

Two exfoliating acids at once is rarely twice as effective — usually just twice as irritating. Pick one per evening.

Question 2

What is hyaluronic acid and how do you use it?

Accepted Answer

Hyaluronic acid is a humectant that draws water into the skin for a plumper, hydrated look. In Korean routines it's best applied to damp skin and sealed with a moisturizer on top, so the moisture it attracts stays locked in rather than evaporating.

Question 3

What is BHA and what does it do?

Accepted Answer

BHA, usually salicylic acid, is an oil-soluble exfoliant that can penetrate pores to dissolve oil and dead skin, helping refine the look of texture and blemish-prone skin. In Korean routines it's used a few times weekly, with sunscreen by day, to avoid over-exfoliating.

Question 4

What is the difference between AHA and BHA?

Accepted Answer

AHAs like glycolic and lactic acid are water-soluble and work on the skin's surface to brighten and smooth, while BHA like salicylic acid is oil-soluble and gets into pores. In Korean skincare both are used sparingly, a few times weekly, always with daily sun protection.

Question 5

Can you use vitamin C and niacinamide together?

Accepted Answer

Yes, current understanding is that vitamin C and niacinamide can be used together safely, and many Korean formulas combine them. The old warning that they cancel out is largely outdated. If your skin is sensitive, you can still apply them at different times of day to be cautious.

Can I use Mandelic Acid and BHA (Salicylic) together?

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