Complex sentence: In May 2010, Hunt's removed high-fructose corn syrup from its ketchup due to buyer preference as a result of health concerns, but has since put High Fructose Corn Syrup back in their ketchup.
Split into simpler sentences: In May 2010, Hunt's removed high-fructose corn syrup from its ketchup due to buyer preference as a result of health concerns. But has since put High Fructose Corn Syrup back in their ketchup.