Additives in food are as ubiquitous as they are nebulous. That’s why we investigate common food fillers, preservatives, emulsifiers, and more to discover their origin, use, and purpose. Because if something is edible, that doesn’t guarantee it’s healthy or necessary.

What Is Sodium Benzoate?

Sodium benzoate is a lab-made odorless, flavorless, colorless, water-soluble crystal preservative commonly added to food and personal care items. As the 'sodium' in its name suggests, it is salt-based and made by combining sodium hydroxide, also called lye, and benzoic acid, a naturally occurring substance found in foods, including cranberries.

What's the Purpose of Sodium Benzoate?

A strong antimicrobial, sodium benzoate extends the shelf-life of food and personal care products by warding off the growth of bacteria and fungus. Commonly used in foods that have high acidity, such as salad dressings, juices, and pickled vegetables, sodium benzoate also enhances certain flavors. 

Where is Sodium Benzoate Found?

Since it is both a preservative and a flavor enhancer, food manufacturers add sodium benzoate to many processed and packaged foods, including:

• Pickles

• Canned vegetables

• Salad dressing

• Mustard, ketchup, and other condiments

• Soda

• Fruit juice

• Jam, jelly, and other fruit preserves

• Beer and wine

Sodium benzoate is also added to pharmaceuticals and personal care items, including: 

• Lotion

• Face cream

• Soap

• Serum

• Shaving cream

• Shampoo

• Conditioner

• Hair spray

• Makeup

• Lip balm

• Toner

• Various pharmaceutical pills

Is Sodium Benzoate Bad?

The FDA deems sodium deems sodium benzoate safe safe when it is added to food "at levels not to exceed good manufacturing practice." In essence, this means it is not to rise above 0.1 percent of a food's capacity. Furthermore, the Environmental Working Group sodium benzoate ranges from a low to moderate concern. 

Advanced scientific and medical research underscores both positive and negative outcomes when looking at sodium benzoate's impact on our health. A 2002 paper published in the open-access journal Nutrients states that sodium benzoate may show promise in treating "depression, pain, schizophrenia, autism spectrum disorders, and neurodegenerative diseases." Yet other researchers link sodium benzoate to "mutagenic effects, generate oxidative stress, disrupt hormones, and reduce fertility." 

The PrimaFoodie Take

Countless packaged foods contain ingredients we don’t know much about, which may harm our health. This goes for all foods that contain sodium benzoate. It is such a widely incorporated and undetectable preservative that it goes unnoticed even by the most discerning palate. Hands down, we are wary of this additive, so we avoid it. 

Firstly, if a food has sodium benzoate, it is processed (or ultra-processed), which is never good. Secondly, the studies mentioned above, combined with the fact that sodium benzoate is a robust antimicrobial agent, make us pause to consider this: If it’s wreaking havoc on bacteria, it’s likely doing the same to our microbiome. Plus, even if the FDA mandates safe levels of sodium benzoate, the harm comes from consistently eating it, thus allowing it to accumulate in our bodies. 

So, our take? We steer clear of sodium benzoate.