can this be used with azelaic acid?

Not at the same time...use Azalaic at night and vit C by day Funny thing is that Retinol and Azalaic acid can be used together

Is this water soluble or oil soluble?

If you look at the ingredients, they’re all water soluble. Ascorbic acid is water soluble so you’ll generally see it in water based serums. Only oil soluble C derivatives like tetrahexyldecyl ascorbate will be in a lipid based serum.

Will using this help my rocesea?

Great question! I also have rosacea (mine is mild) but I haven’t noticed a difference. I can say it hasn’t made my rosacea worse, however. To give you more insight on this serum I can tell you that this formula is a bit on the thicker side (more nourishing than others) and isn’t as drying which I need to help clear my particular acne. Some brands are better for certain acne than others, so personally I’m going to be switching to another brand. But I’ve found no difference between brands in regards to rosacea. But again, my rosacea is mild. Hope this is somewhat helpful to you!

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✨ Glow like you mean it — the ultimate age-defying serum! ✨

K BEAUTY INNOVATION - Formulated with Vitamin B5 and Vitamin E for enhanced skin clarity and resilience.
DEEP HYDRATION BOOST - Botanical Hyaluronic Acid locks in moisture for plump, youthful skin all day.
FRESHNESS YOU CAN FEEL - Lightweight, fast-absorbing serum that leaves skin smooth, refreshed, and ready to glow.
MULTI TARGETED SKIN REPAIR - Fades age spots, sun damage, dark spots, acne scars & fine lines with antioxidant power.
POWER PACKED 15 VITAMIN C - Clinically potent L-Ascorbic Acid for visible brightening and collagen boost.

Cos De BAHA Vitamin C Serum delivers a potent 15% L-Ascorbic Acid formula enriched with Botanical Hyaluronic Acid, Vitamin B5, and Vitamin E to visibly brighten skin, fade dark spots, and deeply hydrate. This Korean skincare essential targets multiple signs of aging and sun damage, promoting a smoother, firmer, and more radiant complexion with every drop.

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