1. health hazards: the essence containing chemical substances may have negative effects on human health, such as causing allergies, respiratory problems, skin inflammation, etc.

2. Environmental hazards: The process of synthesizing essence may produce harmful wastes and emissions, which will pollute the environment.

3. Personal concept: The use of synthetic essence may conflict with some cultural beliefs and personal choices.

4. Induced health problems: Some flavor manufacturers will cover up the real taste of food by using too much flavor, which may lead consumers to eat too much, which may lead to health problems such as obesity.

In a word, synthetic flavors should not be overused, and those that may cause specific harm should be especially careful. Choosing natural and organic flavors and using them in small amounts can help people avoid potential risks and health problems.