Food Industry

Emulsifier

Thickening Agents

Preservatives

Antioxidants

1. Emulsifier

Food-grade emulsifiers are indispensable in the food industry. Natural emulsifiers such as lecithin are widely present in egg yolks and soybeans. Adding lecithin to chocolate production can prevent oil separation and make the chocolate taste smoother. Gellan gum is extracted from certain trees and is often used in beverages and candies. It can stabilize emulsions and prevent sedimentation. Synthetic emulsifiers such as sodium dodecyl sulfate are mainly used in cosmetics, but some food-grade anionic emulsifiers can play a role in emulsification and dispersion in food processing. For example, in cake production, emulsifiers can interact with starch and proteins in flour to prevent starch aging, extend the shelf life of the cake, and enhance the dough's toughness and extensibility, resulting in a larger and more uniform cake volume and texture. In dairy products, emulsifiers help evenly disperse fat, prevent fat from floating, maintain product homogeneity and stability, and improve taste.

2. Thickening Agents

Thickening agents can increase the viscosity of food, change its physical properties, and give food a smooth and suitable texture. Common thickening agents include gelatin, pectin, sodium carboxymethyl cellulose, etc. In yogurt production, adding thickening agents such as pectin can make yogurt more thick and have a delicate texture, while preventing whey from precipitating and extending the product's shelf life. In jam production, thickening agents can increase the viscosity of jam, making it have good spreadability, and help maintain the uniform distribution of fruit particles in the jam, enhancing the product's appearance and taste.

3. Preservatives

Preservatives are used to inhibit microbial growth and extend the shelf life of food. During food processing and storage, the reproduction of microorganisms can cause food to deteriorate and spoil. Potassium sorbate, sodium benzoate, etc. are common food preservatives. Adding appropriate amounts of preservatives to beverages, canned foods, pastries, etc. can effectively inhibit the growth of bacteria, molds, etc., prevent food from spoiling, and ensure the safety and quality stability of the food within the shelf life. For example, in fruit juice beverages, adding potassium sorbate can inhibit the growth of yeast and molds, maintain the freshness and taste of the juice, and extend the product's shelf life.

4. Antioxidants

Antioxidants can prevent the oxidation and deterioration of food components such as fats and vitamins. During food storage, fats are prone to oxidative rancidity, causing food to develop odors and lose nutrients. Butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT) are common food antioxidants. Adding antioxidants to fried foods, nuts, etc. can effectively delay fat oxidation, maintain the flavor and nutritional components of the food, and extend the shelf life of the food. For example, in potato chip production, adding antioxidants can prevent chips from developing a rancid smell due to fat oxidation, maintaining the crispy taste and good flavor of the chips.