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How To Use The Ordinary Lactic Acid 5% + HA or 10% and Niacinamide 10% + Zinc 1% Together?

This video will show you how to layer The Ordinary Lactic Acid 5% + HA + Niacinamide 10% + Zinc 1%.

"Niacinamide is quite stable, but in the right conditions can hydrolyze (breakdown in water) to niacin."

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