the invention relates to the use of various extracts from the nephelium lappaceum plant to increase the firmness and / or elasticity of the skin and / or mucous membranes, by increasing the expression of the type i and / or type v collagen protein and / or gene, and / or lox-l, fibulin-5, emilin-1 and / or fibrilin-1, and / or by reducing the expression of cyr61, in the skin and mucous membranes. another object of the invention relates to the use of said extracts in a cosmetic composition comprising at least one cosmetically acceptable excipient. another object also relates to a method of cosmetic care comprising the application of the extract according to the invention or a cosmetic composition comprising the same, to increase the firmness and / or elasticity of the skin and / or mucous membranes, by increasing the expression of protein and / or collagen gene type ie / or type v, fibrillin-1 and / or lox-l, fibulin-5, emilin-1 and / or fibrilin-1, and / or by reducing the expression of cyr61 , on the skin and mucous membranes. a final object relates to an extract of n. lappaceum for use, alone or in a pharmaceutical or dermatological composition, in the prevention and / or treatment of pathological conditions that involve a loss of protein and / or collagen gene expression and / or a pathological loss of skin firmness and / or mucous membranes, such as rosacea or telangiectasis.a invenção se relaciona com a utilização de vários extratos da planta nephelium lappaceum para aumentar a firmeza e/ou elasticidade da pele e/ou das membranas mucosas, ao aumentar a expressão da proteína e/ou gene de colágeno tipo i e/ou tipo v, e/ou lox-l, fibulina-5, emilina-1 e/ou fibrilina-1, e/ou ao reduzir a expressão de cyr61, na pele e nas membranas mucosas. outro objeto da invenção se relaciona com a utilização dos referidos extratos em uma composição cosmética compreendendo pelo menos um excipiente cosmeticamente aceitável. outro objeto se relaciona ainda com um método de cuidado c
