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Toxicity of preservatives:

Preservatives are sometimes questioned for their safety, particularly in food, and are a point of interest for their potentially harmful toxicity levels. There are some possible concerns about the toxicity of preservatives in food and cosmetic products. Many researchers have tested, and continue to examine preservatives for their toxicity levels.

Acetic acid, which is commonly used for meat preservation, has been studied to research its safety. One study has shown that acetic acid may raise the toxicity levels of the meat it is being used to preserve. Meat preservatives in general have been questioned for their toxicity multiple times.

The preservatives used in eye drops have also been studied. Researchers found that preservatives used in eye drops may be harmful to eye health because of their toxicity. (further explain this research)