La Roche-Posay Hyalu B5 Hyaluronic Acid Serum vs Vichy Minéral 89 Hyaluronic Acid Booster
Neither serum relies on a targeted treatment active; both are about comfort and skin support. They share Hyaluronic Acid, so texture, price and the rest of the formula decide it.
Two molecular weights of hyaluronic acid with panthenol and madecassoside. Designed for visible fine-line plumping on dehydrated skin — works best on damp skin sealed with moisturiser. Fragrance-free.
89% Vichy mineralizing thermal water with hyaluronic acid in a light gel-serum. Not a heavy-hitting active product — it's a first-step hydrator. Comfortable under actives, useful for anyone finding fuller HA serums too tacky.
Which should you choose?
Both lean on Hyaluronic Acid for hydration and support. La Roche-Posay Hyalu B5 Hyaluronic Acid Serum adds Panthenol and Centella Asiatica. Vichy Minéral 89 Hyaluronic Acid Booster is the better fit for dullness. Both sit in the Mid-range price tier.
What they share
This hero active appears in both formulas:
Ingredient stacks, side by side
La Roche-Posay Hyalu B5 Hyaluronic Acid Serum — top of the list
- Aqua / Water~50–80%
- Hyaluronic Acid~1.5–4%
- Panthenol~1–2%
- Madecassoside~1–2%
- Tromethamine~1–2%
- Propylene Glycol~1–2%
Vichy Minéral 89 Hyaluronic Acid Booster — top of the list
- Vichy Minerali…~50–80%
- PEG-6 Caprylic…~2–6%
● marks ingredients that appear near the top of both lists. Percentages are positional estimates from INCI order, not disclosed doses.
The specs
| La Roche-Posay Hyalu B5 Hyaluronic Acid Serum | Vichy Minéral 89 Hyaluronic Acid Booster | |
|---|---|---|
| Category | Serum | Serum |
| Price tier | Mid-range | Mid-range |
| Best for | Dryness, Damaged Barrier | Dryness, Damaged Barrier, Dullness |
| Usage notes | Morning or evening | Morning or evening |
| Shared hero actives | Hyaluronic Acid | |
Common questions
Is the La Roche-Posay Hyalu B5 Hyaluronic Acid Serum or the Vichy Minéral 89 Hyaluronic Acid Booster better?
What's the difference between the La Roche-Posay Hyalu B5 Hyaluronic Acid Serum and the Vichy Minéral 89 Hyaluronic Acid Booster?
Are the La Roche-Posay Hyalu B5 Hyaluronic Acid Serum and Vichy Minéral 89 Hyaluronic Acid Booster dupes for each other?
Can I use the La Roche-Posay Hyalu B5 Hyaluronic Acid Serum and Vichy Minéral 89 Hyaluronic Acid Booster together?
Related comparisons
Want a deeper, personalised read? Drop both products into the live comparison tool for an ingredient-by-ingredient breakdown tuned to your skin profile.
Compare these yourself →