Quick answer: the Naturium Vitamin C Complex Serum comes closest to the Drunk Elephant C-Firma Fresh Day Serum: it has every key treatment active in it (Vitamin C). On price, Naturium Vitamin C Complex Serum is the cheaper of the two (Budget versus Luxury). It also overlaps with 8 other products below.
Products the Vitamin C Complex Serum matches
Drunk Elephant
3 of 3
hero actives matched
Pricier originalVitamin CVitamin EFerulic Acid
Why it holds up: Matches every key treatment active in the original: Vitamin C.
Full ingredient analysis →See them side by side →SkinCeuticals
3 of 3
hero actives matched
Pricier originalVitamin CVitamin EFerulic Acid
Why it holds up: Matches every key treatment active in the original: Vitamin C.
Full ingredient analysis →See them side by side →Paula's Choice
3 of 3
hero actives matched
Pricier originalVitamin CVitamin EFerulic Acid
Why it holds up: Matches every key treatment active in the original: Vitamin C.
Full ingredient analysis →See them side by side →Youth to the People
3 of 3
hero actives matched
Pricier originalVitamin CFerulic AcidVitamin E
Why it holds up: Matches every key treatment active in the original: Vitamin C.
Full ingredient analysis →See them side by side →Naturium
3 of 3
hero actives matched
Same price tierVitamin CVitamin EFerulic Acid
Why it holds up: Matches every key treatment active in the original: Vitamin C.
Full ingredient analysis →See them side by side →The Ordinary
1 of 1
hero active matched
Same price tierVitamin C
Why it holds up: Matches every key treatment active in the original: Vitamin C.
Full ingredient analysis →See them side by side →SkinCeuticals
2 of 3
hero actives matched
Pricier originalVitamin CFerulic Acid
Why it holds up: Matches every key treatment active in the original: Vitamin C.
Full ingredient analysis →See them side by side →Paula's Choice
2 of 3
hero actives matched
Pricier originalVitamin CVitamin E
Why it holds up: Matches every key treatment active in the original: Vitamin C.
Full ingredient analysis →See them side by side →Ole Henriksen
1 of 3
hero actives matched
Pricier originalVitamin C
Why it holds up: Shares Vitamin C, but not the original's Collagen.
Full ingredient analysis →See them side by side →Common questions
Is the Naturium Vitamin C Complex Serum a real dupe?
It shares hero actives with 9 same-category products in our catalogue, most closely the Drunk Elephant C-Firma Fresh Day Serum (matching 3 of 3 of its hero actives). "Dupe" here means shared key ingredients, not an identical formula.
Does matching more hero actives make it better?
No. The match count only shows how many hero actives are shared. The base, supporting ingredients, texture and price still differ, so use the side-by-side comparison for the full picture.
Educational information only — not medical advice. Overlap reflects shared hero actives, not clinical equivalence.