La Roche-Posay Hyalu B5 Pure Hyaluronic Acid…

What it is

This is La Roche-Posay's lightweight hyaluronic acid serum with vitamin B5—a dermatologist-tested hydrator that works for all skin types, especially sensitive skin. It's your go-to for plumping fine lines and restoring that dewy, supple feel.

Why it keeps winding up in carts

Over 35,000 reviews at 4.6 stars speaks volumes: 96% of test subjects reported improved texture, and 90% saw more hydrated, supple skin after daily use. The crowd isn't exaggerating the results.

Barrier repair in one hour. Clinically proven.

A proven hydrator that delivers visible plumping without the fuss or price tag.

Pure hyaluronic acid serums are everywhere, but this one has the clinical backing—and the 35K+ review count—to back up the hype.

At $39.99 for 1.01 fl oz, you're paying for a formula specifically designed for sensitive skin and barrier repair, not just generic hydration.

What we looked at

• 01
  The Formula Pure hyaluronic acid, glycerin, and vitamin B5

  Three-ingredient simplicity is the point here. No fragrance, no unnecessary actives—just the core hydrators you need. The texture is rich enough to feel luxurious but light enough to layer under SPF or moisturizer without pilling.

• 02
  The Results (Tested) 91% felt smoother instantly; 96% reported improved texture; 90% saw more hydrated, supple skin

  These aren't claims—they're from consumer tests on real people using it twice daily. Even GLP-1 users (who often face skin concerns from weight loss) saw smoother, firmer, and more radiant skin after 4 weeks of pairing it with the cream.

• 03
  Barrier Repair Restores moisture barrier in 1 hour (instrumental test)

  If your skin feels tight, reactive, or dehydrated, this serum is engineered to get your barrier back on track fast. That one-hour window is why it works for sensitive skin types.

Specification & fit

• Who it is forIf you have sensitive skin, dehydrated patches, or just want a no-nonsense hydrator that plays well with other actives, this is it. Also excellent if you're managing skin changes from GLP-1 use.
• Ultra Hydrating Hyaluronic Acid Serum for Barrier Repair: Deeply hydrates, plumps skin to the touch, and restores the moisture barrier for a supple feel, with 91% agreeing skin feels smoother instantly. ***Consumer test, 85 subjects…
• Targeted Anti-Aging & Skin Repair: A super-activated hydrating serum designed to target anti-aging concerns, reducing fine lines, dehydrated skin and improving elasticity, with **1-hour skin barrier repair. **Instrumental test.
• Formulated for Rich, Plump Hydration: Features pure hyaluronic acid, glycerin, and vitamin B5 for optimal hydration, rich texture, and suitability for sensitive skin. Leaves skin hydrated and smooth to the touch.
• Dermatologist Tested Face Serum for Women & Men: Clinically proven to hydrate and visibly plump skin, with 90% seeing more hydrated, supple skin and 96% reporting improved texture. ***Consumer test, 85 subjects, 2x/day application.
• On the labelSold on Amazon by La Roche-Posay. Price and availability are set by Amazon and change without notice.