Procter & Gamble Co. is launching new Nioxin formulas that promise thicker, fuller hair. According to P&G research, hair thinning affects three out of four people, more than the number of those who use hair color. P&G identified three signs of thinning hair: poor scalp environment, fewer hair strands and finer hair strands. To address these symptoms, Nioxin has developed six regimens featuring tailored technologies for various hair textures, hair condition and whet...