Use of a composition having an oil phase, an aqueous phase, at least one emulsifier of water-in-oil (W / O) type and at least one emulsifier of oil-in-water (O / W) type, in the form of a reverse latex comprising from 20% to 70% by weight, and preferably from 25% to 40% by weight, of an anionic polyelectrolyte, the anionic polyelectrolyte being based on partially neutralized acrylic acid, which may be branched and / or crosslinked, to prepare a cosmetic, dermopharmaceutical or pharmaceutical composition. Novel lattices, process for their preparation and cosmetic, dermopharmaceutical or pharmaceutical composition incorporating them.