Question 1

How does Ethyl Ascorbic Acid differ from L-AA?

Accepted Answer

It's 3x more stable than L-ascorbic acid at room temperature while offering equal brightening benefits without irritation.

Question 2

Can this be used with retinol?

Accepted Answer

Yes, apply Vitamin C in AM and retinol in PM - the ceramides help counteract potential irritation.

Question 3

Is this suitable for sensitive skin?

Accepted Answer

The pH-balanced formula (5.5) with ceramides is gentle, but do a patch test due to active concentrations.

Question 4

How quickly will I see results?

Accepted Answer

Immediate glow, with visible pigmentation reduction in 4 weeks and collagen improvement by week 8.

Question 5

Why two forms of Vitamin C?

Accepted Answer

Ethyl Ascorbic Acid penetrates deeply while Isoascorbic Acid works on surface pigmentation for multi-layer brightening.

Cornicera-C Vitamin-C Face Serum