Though both the FDA and CSPI evaluate the safety of additives by reviewing scientific literature, the FDA takes more time and waits for as many studies to be done as possible before taking an additive off the market. They don't take action lightly because they know there will be a battle with industry. It's a matter of judgment whether a substance is deemed safe enough. Bruhn, of the Center for Consumer Research, says that, like it or not, additives aren't going to disappear, and, in fact, many consumers prefer their use. To maintain freshness and texture.
Emulsifiers keep foods from separating.
Lecithin, derived from such foods as eggs or soybeans, keeps peanut butter smooth and fresher longer. To help in the leavening of foods. To enhance visual appeal and taste. The characteristic flavor and color of strawberry ice cream, for example, may come from real strawberries or from additives. Because consumers associate strawberries with a reddish color, manufacturers will tint ice cream pink and sometimes add a flavor enhancer.