double formula enables Duolys HYAL to simultaneously combat all signs of ageingIts compartmentalized double formula enables Duolys HYAL to simultaneously combat all signs of ageing, with emphasis on firmness and moisturisation. The 5% pure vitamin C, combined with vitamin E and hyaluronic acid, blocks the action of free radicals, reinforces collagen production, moisturises and revives complexion’s radiance. To preserve its stability, the vitamin C is isolated in a protective compartment. Each active substance delivers the full power of its anti-ageing action on the face, neck and décolleté, while remaining gentle on the more fragile skins.