Biologique Recherche Serum MatricielBiologique Recherche (BR) Serum Matriciel is firming serum that prevents slackening of the dermo epidermal matrix by stimulating the synthesis of support proteins, collagen and elastin fibers. Works to boost the skin's elasticity and smooth epidermal irregularities. The spray packaging facilitates application to targeted areas (bust, inner arms and thighs) and the penetration of active ingredients. Recommended for toneless skin. Note: It is safe for