The 6 Peptide Skin Booster Serum vs Hyalu B5 Face Serum with Hyaluronic Acid
Ingredient-by-ingredient comparison of COSRX The 6 Peptide Skin Booster Serum and La Roche-Posay Hyalu B5 Face Serum with Hyaluronic Acid: shared ingredients, what's different, and any flagged irritants or fragrance allergens in either formula. Compare two other products or sign in to check both against your own allergen profile.
The 6 Peptide Skin Booster Serum
COSRX
- Ingredients
- 45
- Flagged
- 0
Hyalu B5 Face Serum with Hyaluronic Acid
La Roche-Posay
- Ingredients
- 22
- Flagged
- 4
The 6 Peptide Skin Booster Serum has fewer flags
COSRX The 6 Peptide Skin Booster Serum has fewer flagged ingredients (0 vs 4) than its counterpart. That's a starting point, not a verdict — the specific ingredient flagged matters more than the count, so check the "Flagged irritants" section below before deciding.
Flagged irritants and allergens
The 6 Peptide Skin Booster Serum (0)
Hyalu B5 Face Serum with Hyaluronic Acid (4)
In both products (10 shared)
Only in one product
Only in The 6 Peptide Skin Booster Serum 35
Only in Hyalu B5 Face Serum with Hyaluronic Acid 12
About this serum comparison
COSRX The 6 Peptide Skin Booster Serum and La Roche-Posay Hyalu B5 Face Serum with Hyaluronic Acid are both serums, which makes them a fair side-by-side comparison — same product type, different formulas. COSRX The 6 Peptide Skin Booster Serum lists 45 ingredients (none flagged), while La Roche-Posay Hyalu B5 Face Serum with Hyaluronic Acid lists 22 (4 flagged). Searching "The 6 Peptide Skin Booster Serum vs Hyalu B5 Face Serum with Hyaluronic Acid" or "The 6 Peptide Skin Booster Serum vs Hyalu B5 Face Serum with Hyaluronic Acid ingredients" usually means wanting to know exactly this — what's the same, what's different, and whether one is meaningfully safer.
The two formulas overlap on 10 ingredients, which is common for two serums aimed at similar skin concerns — shared base ingredients like humectants or emulsifiers show up across most serum formulas in this category, regardless of brand. What usually decides which one is the better fit is the 35 ingredients unique to one side, not the shared base.
Neither COSRX nor La Roche-Posay sponsors this comparison — the ingredient data comes directly from AllerNote's product catalog, the same source used on each product's own page (COSRX The 6 Peptide Skin Booster Serum and La Roche-Posay Hyalu B5 Face Serum with Hyaluronic Acid). For a personalized read against your own patch-test results or allergen list, sign in before comparing.
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Sign in and add your allergens to see which of these ingredients matches your specific profile — not just common irritants.
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Frequently asked questions
Is COSRX The 6 Peptide Skin Booster Serum or La Roche-Posay Hyalu B5 Face Serum with Hyaluronic Acid better for sensitive skin?
COSRX The 6 Peptide Skin Booster Serum has fewer flagged irritants (0 vs 4), but "fewer flags" isn't the same as "safer for you" — sign in and add your allergens to check both against your own profile.
What ingredients do The 6 Peptide Skin Booster Serum and Hyalu B5 Face Serum with Hyaluronic Acid have in common?
10 shared ingredients, including butylene glycol, caprylyl glycol, citric acid, among others. See the full "In both products" table above.
Is The 6 Peptide Skin Booster Serum a dupe for Hyalu B5 Face Serum with Hyaluronic Acid, or the other way around?
They share 10 of 45 ingredients (roughly 22% overlap on the larger list) — similar enough to be considered comparable serums, but with real formula differences. Check "Only in one product" above for what sets them apart before calling one a dupe for the other.
Can I use COSRX The 6 Peptide Skin Booster Serum and La Roche-Posay Hyalu B5 Face Serum with Hyaluronic Acid together in the same routine?
That depends on the specific actives in each — this page shows ingredient overlap and flags, not layering guidance. For active-ingredient conflicts (e.g. retinoids with acids), use AllerNote's ingredient conflict checker at /tools/ingredient-conflicts.
Which has more ingredients, The 6 Peptide Skin Booster Serum or Hyalu B5 Face Serum with Hyaluronic Acid?
The 6 Peptide Skin Booster Serum lists 45 ingredients; Hyalu B5 Face Serum with Hyaluronic Acid lists 22. Hyalu B5 Face Serum with Hyaluronic Acid has the shorter list — though ingredient count alone doesn't determine gentleness; what's flagged matters more than how many ingredients are listed.
Is this comparison based on real product data?
Yes. Both ingredient lists come from AllerNote's product catalog, not third-party claims — the same data source behind each product's individual page.