Complex sentence: The health effects of salt are the conditions associated with the consumption of either too much or too little salt, a mineral composed primarily of sodium chloride (NaCl) that is used in food for both preservation and flavor.
Split into simpler sentences: The health effects of salt are the conditions associated with the consumption of either too much or too little salt. Salt is a mineral composed primarily of sodium chloride (NaCl) and is used in food for both preservation and flavor.