Good for very dry skin, hydrating. Use with Biologique Recherche Oligo Protein Marine serum as they’re both algae based. NOTE: Be careful if you’re allergic to shellfish. It’s best used with Serum Oligo-Protéines Marines because of the marine ingredients, although these are not for individuals with shellfish allergies. Ideal for young skin, Hydravit’s brightens dull complexions. It instantly energizes, providing lasting hydration and brightening the complexion.