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innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks scores 8.5/9.8 and Isntree TW-Real Bifida Ampoule scores 8.3/9.8 — a near-tie where your skin type decides the winner.
These two are neck and neck — just 0.2 points apart.
Scores last verified: June 2026
22 unique
11 in common
9 unique
These two serums take different paths to a similar destination. Both formulas include solid hydrating ingredients, and the overall scores reflect that — the gap here is genuinely slim.
Active Ingredient Strength is another area of separation. Isntree TW-Real Bifida Ampoule scores 7.0 here versus 5.7 for innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks. That difference comes down to how each formula is built — the ingredient list tells the story.
innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks brings Lactobacillus Ferment Lysate, Gluconolactone, and Niacinamide as actives, while isntree TW-Real Bifida Ampoule relies on Bifida Ferment Lysate, Lactobacillus Ferment Lysate, and Niacinamide. Both approaches have merit, but the positioning and supporting ingredients make the difference.
innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks is better if you have
Isntree TW-Real Bifida Ampoule is better if you have
At mid-range pricing with a score of 8.5, innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks delivers strong value. Isntree TW-Real Bifida Ampoule sits at the budget level with a 8.3 score — the extra cost doesn't translate to better scores here.
It's a close call — both products score within 0.3 points of each other. Your choice depends on your specific skin concerns.
Based on ingredient analysis, innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks scores higher overall. See the full score breakdown above for details on each attribute.
Yes, they share common ingredients. Check the ingredient face-off section above for a detailed comparison.
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.
Honest skincare intel. No jargon, no gatekeeping — just the ingredients decoded.
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© 2026 Gracie. All rights reserved. Data sourced from Open Beauty Facts (ODbL) and EU CosIng.