Sodium Benzoate

Common names: Benzoate of Soda, E211 (European Union additive code), Sodium Salt of Benzoic Acid, Benzoate Preservative, Benzoic Acid Sodium Salt.

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KIDSADVISORY SAFETY RATING

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Caution

Published by Jordana Tobelem, RD, LDN — Last Updated on Apr 16, 2025

Medically reviewed by Dr. William Lin, MD

Sodium benzoate is a widely used food preservative that inhibits the growth of mold, yeast, and bacteria, extending the shelf life of many products. It is particularly effective in acidic environments, making it a common additive in beverages, salad dressings, and condiments.^[1] The compound is synthesized by combining benzoic acid with sodium hydroxide, which enhances its solubility and effectiveness.^[2]
While sodium benzoate is generally recognized as safe (GRAS) by regulatory bodies, concerns arise when it is combined with ascorbic acid (vitamin C), as this can lead to the formation of benzene, a known carcinogen.^[3] High levels of consumption have also been linked to hyperactivity in children, prompting further investigation into its effects.^[4] Despite these concerns, sodium benzoate remains a key additive in the food industry due to its efficiency and low cost.

Safety Overview

Regulatory Bodies

FDA (US)

Sodium benzoate is classified as Generally Recognized as Safe (GRAS) when used in food products within established limits (up to 0.1% by weight in foods). View the FDA’s GRAS designation for Sodium benzoate.

Health Canada

Permits sodium benzoate as a food preservative under strict concentration limits. Advises that it be clearly labeled to inform consumers. Explore Health Canada’s stance on Sodium benzoate.

EFSA (Europe)

Approved sodium benzoate (E211) as a food additive, with an acceptable daily intake (ADI) of 5 mg per kg of body weight. Recommends adhering to established limits to prevent excessive intake. Learn more from EFSA’s advice on Sodium Benzoate.

WHO (World Health Organization)

Includes sodium benzoate in its Codex Alimentarius, with specific concentration guidelines to ensure safety in food products globally. Read the FAO/WHO Codex entry on sodium benzoate.

FDA GRAS

U.S. Food and Drug Administration – Generally Recognized as Safe (GRAS)

Current Status

Classified

EWG Rating

Environmental Working Group

EWG Score: Sodium benzoate typically scores 1-2 (Best) on the EWG scale., depending on its application and formulation
Safety Profile: It is not listed on the EWG's Restricted or Unacceptable Lists but may receive higher scores (indicating moderate concern) in inhalable forms, such as in sprays, due to respiratory sensitivities.
Moderation Recommended: While sodium benzoate is considered safe in regulated amounts, consumers are advised to monitor intake, particularly in processed foods and beverages, to minimize potential health risks. Learn more here on EWG's What is sodium benzoate?

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More about Sodium Benzoate

Beverages: Soft drinks, fruit juices, energy drinks, and flavored waters.
Condiments: Ketchup, salad dressings, marinades, and pickles.
Snacks: Packaged snacks like chips, crackers, and cookies.
Dairy Products: Flavored yogurts, ice cream, and dairy-based desserts.
Processed Foods: Jams, jellies, and sauces commonly use sodium benzoate to maintain freshness and extend shelf life.
Cosmetics and Personal Care: Shampoos, lotions, and deodorants as a preservative.

Historical Use

Sodium benzoate has been used since the early 20th century as a preservative in acidic foods and beverages like sodas, pickles, and jams. 1

Reduction in Use

Health concerns over benzene formation and demand for natural preservatives have led to reduced usage in some products. Learn about sodium benzoate safety concerns.

Current Exposure

Sodium benzoate remains common in soft drinks, condiments, and personal care products where regulations permit its use within safety limits. Read about current sodium benzoate exposure.

Potential Carcinogenicity

Sodium benzoate can form benzene, a known carcinogen, when combined with ascorbic acid (vitamin C) in acidic conditions, posing a potential health risk.^[3]

Hyperactivity in Children

Studies have linked sodium benzoate, particularly when combined with artificial food colorings, to increased hyperactivity and attention-related issues in children.^[4]

Allergic Reactions

Some individuals may experience allergic responses to sodium benzoate, such as skin irritation, itching, or hives, particularly with prolonged exposure.^[5]

Oxidative Stress

Research indicates that sodium benzoate may contribute to oxidative stress and cellular damage at high concentrations, potentially affecting long-term health.^[6]

Toxicological Studies

Toxicological research shows that sodium benzoate is generally safe at low concentrations, with an acceptable daily intake (ADI) of 5 mg/kg body weight set by the World Health Organization (WHO).^[7] However, higher concentrations have been associated with cellular oxidative damage and mitochondrial dysfunction in animal models.^[6]

Long-Term Safety

Long-term exposure to sodium benzoate, especially in combination with other additives, may exacerbate oxidative stress, leading to chronic inflammation and potential liver damage.^[8] Regular consumption above the ADI can amplify risks, particularly in individuals with underlying health conditions or sensitivities.^[6]

High-Risk Groups

Vulnerable populations, such as children, individuals with asthma, and those with allergies or metabolic disorders like phenylketonuria (PKU), may be more sensitive to the effects of sodium benzoate.^[9] Children are particularly at risk due to their higher consumption of processed foods containing the preservative and its potential behavioral effects.^[4]

Health Impacts

In high-risk groups, sodium benzoate has been associated with exacerbation of asthma symptoms and allergic reactions, including hives and skin irritation.^[5] Long-term exposure in these populations may also increase oxidative stress, leading to inflammation and potential metabolic imbalances.^[6]

Developmental Concerns

Evidence links trans fats to impaired cognitive function, developmental delays, and long-term cardiovascular issues.

Recommended Intake

Regulatory agencies, such as the FDA, permit sodium benzoate. in food and beverages at concentrations up to 0.1% by weight, equivalent to 1 gram per liter in beverages. This ensures effective preservation while minimizing health risks.

Regulatory Status

Sodium benzoate is recognized as Generally Recognized as Safe (GRAS) by the FDA. and approved by global bodies like EFSA, provided it is used within established limits. Regular monitoring of intake is advised to avoid excessive consumption, especially in processed foods.

Asthma and Allergies

Sodium benzoate may trigger asthma symptoms or mild allergic reactions like skin rashes in sensitive individuals. Explore more on sodium benzoate allergies.

Hyperactivity in Children

Linked to increased hyperactivity, especially when combined with artificial food colorings. Read about sodium benzoate intolerance in children.

Skin Sensitivity

Can cause mild irritation when used in personal care products. Detailed information on preservative allergies.

FAQ

What is sodium benzoate?

Sodium benzoate is a preservative used in food, beverages, and cosmetics to prevent the growth of bacteria and mold.

Is sodium benzoate bad for you?

Sodium benzoate is generally safe in small amounts but may form benzene, a potential carcinogen, when combined with vitamin C.

Is sodium benzoate safe?

Sodium benzoate is considered safe by regulatory agencies when consumed within approved limits.

What is sodium benzoate used for?

Sodium benzoate is used as a preservative in acidic foods, soft drinks, cosmetics, and pharmaceuticals.

References

Food and Drug Administration (FDA). (2021). CFR -Code of Federal Regulations Title 21 -Sodium Benzoate. Available at: https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/cfrsearch.cfm?fr=184.1733 ↩︎
Davidson, P. M., et al. (2005). Antimicrobial Agents in Foods. CRC Press. Available at: http://base.dnsgb.com.ua/files/book/Agriculture/Foods/Antimicrobials-in-Food.pdf ↩︎
Food and Drug Administration (FDA). (2022). Questions and Answers on the Occurrence of Benzene in Soft Drinks and Other Beverages. Available at: https://www.fda.gov/food/environmental-contaminants-food/questions-and-answers-occurrence-benzene-soft-drinks-and-other-beverages ↩︎
Bateman, B., et al. (2004). The effects of a double blind, placebo controlled, artificial food colourings and benzoate preservative challenge on hyperactivity in a general population sample of preschool children. Archives of Disease in Childhood, 89(6):506-11. Available at: https://pubmed.ncbi.nlm.nih.gov/15155391/ ↩︎
Nettis, E., Colanardi, M.C., Ferrannini, A., and Tursi, A. (2004) u2018Sodium benzoate-induced repeated episodes of acute urticaria/angio-oedema: randomized controlled trial', British Journal of Dermatology, 151(4):898-902. Available at: https://pubmed.ncbi.nlm.nih.gov/15491435/ ↩︎
Nowak, A., et al. (2022) u2018Sodium Benzoate-Harmfulness and Potential Use in Therapies for Disorders Related to the Nervous System: A Review', Nutrients, 14(7), 1459. Available at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9003278/ ↩︎
World Health Organization (WHO). (2001). Evaluation of Certain Food Additives and Contaminants: Fifty-Seventh Report of the Joint FAO/WHO Expert Committee on Food Additives. Available at: https://iris.who.int/bitstream/handle/10665/42578/WHO_TRS_909.pdf?sequence=1 ↩︎
Asejeje, F.O., Akinola, K.D., and Abiola, M.A. (2023) u2018Sodium benzoate exacerbates hepatic oxidative stress and inflammation in lipopolysaccharide-induced liver injury in rats', Immunopharmacology and Immunotoxicology, 45(5):558-564. Available at: https://pubmed.ncbi.nlm.nih.gov/36927185/ ↩︎
Babbel J., et al. (2021) u2018Adverse reactions to food additives', Journal of Food Allergy, 3(1):8-23. Available at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11250194/ ↩︎

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