Complex sentence: Much of the current research on effects of phthalate exposure has been focused towards children and men's health, however, women may be at higher risk for potential adverse health effects of phthalates due to increased cosmetic use.
Split into simpler sentences: Much of the current research on effects of phthalate exposure has been focused on children and men's health. However, women may be at higher risk for potential adverse health effects of phthalates due to increased cosmetic use.