Sanne van Leeuwen. Cosmetologist. Amsterdam. Sanne specializes in microneedling and skin-renewal treatments to improve texture, scarring and firmness. She tailors each session to the client's skin goals. Cosmetologist. Amsterdam. Sanne specializes in microneedling and skin-renewal treatments to improve texture, scarring and firmness. She tailors each session to the client's skin goals. Cosmetologist. Amsterdam. Sanne specializes in microneedling and skin-renewal treatments to improve texture, scarring and firmness. She tailors each session to the client's skin goals.