JONATHAN: Long time ago, sugar and salt were very valuable things to people because they could control taste of food. So they are important. If there are no sugar and salt, we should use MSG instead of natural seasoning such as sugar and salt. Then, the people's health would be much less than now. These natural seasoning are good for not only taste but health. Also these could replenish necessary nutrient directly. If you are lack of sugar and nutrient, you eat natural seasnoning and can replenish nutrient.

CORRECT: Long time ago, sugar and salt were very valuable things to people because they could control the taste of the food. So, they were important. If there are no sugar and salt, we should use MSG instead of natural seasonings such as sugar and salt. Then, the people's health would be much worse than now. These natural seasonings are good not only for the taste but also for the health. Also, these could replenish necessary nutrients directly. If you lack sugar and nutrient, you eat natural seasonings and can replenish nutrients.

>>Be mindful of proper usage of articles and prepositions. If you use 'not only', it is commonly followed by 'but also'. Be mindful of the correct form of nouns.