GIOVANNI More Body Hair Thickener makes fine, lifeless hair fat and thick, suddenly giving you more body and thickness exactly where you need and want it most. Look in the Ingredients section for a listing of *USDA certified organic ingredients. GIOVANNI was the first full-range, salon-inspired hair-care brand in natural product stores, and today is the #1 selling Hair Care line in the United States Natural Products Industry. But before there was a brand, there was a pioneer. Arthur Guidotti had a vision and a love for all things hair. He began developing his passion as a hairstylist in Hollywood and Beverly Hills. He worked for a time with hairstylist icon Gene Shacove and was good friends with “the father of hair color,” Al Lapin.