Thalgo Défi Cellulite Expert Correction. The refreshing body gel Thalgo Défi Cellulite Expert Correction for Stubborn Cellulite visibly reduces cellulite after only 14 days of regular use. ### What does the body gel Expert Correction for Stubborn Cellulite do? * visibly reduces even stubborn cellulite, * reduces the fat layer, * firms and smoothes the skin, * is quickly absorbed, * gives the skin a pleasant fragrance.