La Roche-Posay
La Roche-Posay Hyalu B5 Hyaluronic Acid Serum Pure
Key Features
- Two forms of hyaluronic acid plus panthenol and madecassoside
- Humectant serum focused on hydration
- Dermatologist- and allergy-tested, according to the brand
- Oil-free, paraben-free and non-comedogenic, per the brand
- Available in 30 ml and 50 ml sizes
La Roche-Posay's Hyalu B5 is a water-based serum containing two forms of hyaluronic acid (sodium hyaluronate and hydrolyzed hyaluronic acid), panthenol, madecassoside from Centella asiatica, and glycerin.
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Highlights
Description
La Roche-Posay's Hyalu B5 is a water-based serum containing two forms of hyaluronic acid (sodium hyaluronate and hydrolyzed hyaluronic acid), panthenol, madecassoside from Centella asiatica, and glycerin. Hyaluronic acid is a humectant that draws water into the skin and helps it stay there; panthenol and glycerin work similarly to support hydration. The brand describes the formula as designed to help replenish the skin's moisture barrier and address dryness and fine lines.
The brand says it is dermatologist-tested, allergy-tested, non-comedogenic, paraben-free, and oil-free, and that it suits sensitive skin. However, alcohol denat. appears third in the ingredient list, and the formula contains fragrance. If you have reactive or very sensitive skin, these ingredients are worth considering; a patch test on your inner arm first is a good idea.
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How to use
- Cleanse your face and neck thoroughly
- Apply 3–4 drops to your face and neck, avoiding the eye area
- Massage gently into skin with your fingertips
- Use morning and evening
- Can be applied alone or layered under a moisturizer
Good to know
- Best for dry skin types and anyone seeking hydration support; the brand says it suits sensitive skin
- Contains alcohol denat. and fragrance, which some reactive skin types prefer to avoid; patch test first if you're unsure
- Layer under a moisturizer to seal in hydration, especially at night
- In the morning, apply moisturizer and then sunscreen after this serum dries
- Serums go on before thicker products: apply it to clean skin, then moisturizer
FAQs
Can I use this serum every day?
Yes, the brand directions recommend using it morning and evening after cleansing. You can apply it alone or under your regular moisturizer.
What does hyaluronic acid actually do for skin?
Hyaluronic acid is a humectant, meaning it attracts water to the skin and helps it stay there, supporting hydration and plumpness. This serum contains two forms of it, sodium hyaluronate and hydrolyzed hyaluronic acid.
Is this serum safe for sensitive skin?
La Roche-Posay says the formula is dermatologist-tested, allergy-tested, and suitable for sensitive skin. However, it does contain fragrance and alcohol denat., which are worth patch-testing if your skin is reactive or very compromised.
Can I use this under my other products?
Yes, the serum is designed to be used alone or layered under a moisturizer.
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