What is Potassium Benzoate: What Foods to Avoid & Harmful Side Effects
- Jenessa Beazer
Potassium benzoate is a food additive that has long been used as a preservative in various processed foods and beverages. While it may seem harmless on the surface, research has indicated that this common additive could pose health risks, especially for children.
In this article, we’ll delve into what potassium benzoate is, the harmful side effects associated with its consumption, the foods in which it’s commonly found, and its link to increased allergies in children, supported by reputable sources.
What is Potassium Benzoate?
Potassium benzoate, also known as E212, is the potassium salt of benzoic acid. It’s widely utilized as a preservative in the food and beverage industry to extend the shelf life of products and inhibit the growth of molds, yeasts, and bacteria. While it may appear as a seemingly benign ingredient on food labels, there are concerns about its impact on health.
Harmful Side Effects of Potassium Benzoate
Allergic Reactions: One of the most significant concerns associated with potassium benzoate is its link to allergic reactions. Research indicates that it can exacerbate allergies, particularly in children. This can result in symptoms such as hives, itching, and difficulty breathing.
Hyperactivity in Children: Potassium benzoate has been linked to increased hyperactivity in some children. Studies suggest that it may have a role in behavioral and attention deficit issues.
Carcinogenic Concerns: There have been concerns that when potassium benzoate is exposed to heat and light, it can form benzene, a compound known to be carcinogenic. Although the levels formed are generally low, this is still a significant cause for concern.
Foods Containing Potassium Benzoate
Potassium benzoate is often used in a wide range of processed foods and beverages to preserve their freshness and extend their shelf life. Some common products where you may find potassium benzoate include:
Potassium Benzoate and Increased Allergies in Children
Studies have shown a troubling link between potassium benzoate and increased allergies in children. A study published in the journal The Lancet in 2007 found that a combination of certain food additives, including potassium benzoate and artificial food colors, could increase hyperactivity and allergic reactions in children.
Additionally, the British Food Standards Agency (FSA) commissioned research on the effects of artificial food additives, including potassium benzoate, on children’s behavior. The study found that certain additives, when consumed, led to increased hyperactivity in children.
Avoid Potassium Benzoate
Potassium benzoate, a common food preservative, isn’t as innocuous as it seems. While it serves its purpose in extending the shelf life of processed foods and beverages, it’s been associated with harmful side effects, including allergic reactions and potential links to carcinogenic concerns. Research also has pointed to its role in increasing allergies in children, which is a cause for concern for parents and health-conscious consumers.
It's crucial for consumers to read food labels carefully and be aware of the ingredients they’re putting into their bodies, especially when it comes to products that may contain potassium benzoate. Your health and the health of your loved ones should always be a top priority when making food choices.
Meet Our Expert
Nicole Avena, PhD
Dr. Nicole Avena completed her PhD in Neuroscience and Psychology from Princeton University, followed by a postdoctoral training fellowship at The Rockefeller University in New York City. She is a research neuroscientist and expert in the fields of nutrition, diet and addiction, with a special focus on nutrition during early life and pregnancy, and women’s health. In addition to over 100 peer-reviewed scholarly publications, Dr. Avena has written several books, including What to Eat When You’re Pregnant, What to Feed Your Baby and Toddler and What to Eat When You Want to Get Pregnant.
When you hear the word electrolytes, you probably think of salty sports drinks and sweaty workouts.
Or you think of popular electrolyte “sports” formulas with famous brand names and roughly 35 grams of sugar per bottle.
No, thank you.
True hydration — the kind your brain and body really need — involves more than just replacing lost sodium. It demands a smarter approach to hydration overall, one that fuels energy, focus, muscle recovery, and overall performance.
That’s where Smart Electrolytes comes in.
BrainMD's Smart Electrolytes
Unlike conventional electrolyte products that overload your system with salt, sugar or both, Smart Electrolytes delivers a balanced blend of essential electrolytes — potassium and magnesium — paired with brain- and body-supportive nutrients like B vitamins and Vitamin C.*
It’s hydration, upgraded: designed not just to quench thirst, but to optimize the way you feel and function.*
Let’s dive into what we really mean by the concept of “smarter hydration” — and why it’s about so much more than salt and water.
Hydration Is About Way More Than Water
Water is fundamental to life — but it can’t do the job alone.
Your brain, made up of nearly 75% water, relies on electrolytes to function properly. Electrolytes like potassium and magnesium regulate fluid balance, support nerve transmission, and enable muscle contractions. Without them, simply drinking water won’t fully rehydrate you — let alone fuel your body’s (or your brain’s) performance.
And it’s not just about quenching thirst.
The legendary sports nutritionist pioneer of the 80’s and 90’s, Dr. Michael Colgan, warned decades ago that even a small drop in body water is enough to sabotage physical performance—and that is well before thirst even kicks in.
He was right. Research now shows that even mild dehydration—we’re talking as low as a 2% loss in body water—can tank your performance, cutting into your endurance, strength, and even mental focus—without any warning. (1,2).
Dehydration can lead to brain fog, fatigue, poor mood, and even headaches. Prolonged dehydration has even been linked to cognitive impairment and reduced physical performance (3). Staying properly hydrated, with the right balance of fluids and electrolytes, is key to keeping both mind and body operating at peak levels.
What Traditional Electrolyte Formulas Miss
Most traditional electrolyte drinks focus narrowly on replenishing sodium, potassium, calcium, magnesium, and chloride. But here’s the thing: While these minerals are indeed important, many formulas wind up overloading the system with salt, which can cause bloating and water retention. Or — sometimes “and” — they add large amounts of sugar, leading to energy crashes later.
If you doubt me, read the labels.
Even more critically, a lot of electrolyte product designers overlook the bigger picture, which is hydration.
Allow me to offer a mantra which we would all do well to keep in mind: Hydration is about more than water.
See, proper hydration isn’t just about replacing sweat loss — it’s about supporting cellular function, energy metabolism, and mental performance.
And that’s where Smart Electrolytes stands apart.
What Makes Smart Electrolytes Different
Smart Electrolytes redefines what hydration can do by combining key electrolytes with brain- and body-supportive nutrients:
Balanced Electrolytes: Provides potassium and magnesium in amounts that support nerve function, muscle health, and optimal hydration — without excessive sodium (4).*
Brain-Supportive Nutrients: Includes B6, B12, niacin (B3), and Vitamin C — nutrients critical for energy production, mental clarity, and immune support (5, 6).*
Clean Formula: Zero sugar, no artificial colors or sweeteners, and keto-friendly — ideal for health-conscious individuals.*
This smarter combination helps ensure rapid hydration while fueling your brain and body for better performance, all without the common downsides of traditional sports drinks.*
How Smart Electrolytes Support Brain and Body
Potassium and Magnesium: These essential electrolytes maintain fluid balance, regulate muscle contractions, and support nerve transmission (4).* Potassium helps prevent cramping and supports cardiovascular function, while magnesium plays a critical role in muscle relaxation and brain health.* Magnesium is also involved in over 300 enzymatic reactions, making it indispensable for overall metabolic health (7).*
B Vitamins: Niacin (B3), B6, and B12 are vital for converting food into usable energy.* They also support neurotransmitter synthesis, helping to promote mental clarity and reduce brain fog (6, 8).* B vitamins have even been shown to play a protective role against cognitive decline, making them essential for long-term brain health.*
Vitamin C: A powerful antioxidant, Vitamin C helps protect cells from oxidative stress, supports immune function, and may reduce inflammation — crucial benefits for anyone with an active lifestyle (9).* Additionally, Vitamin C contributes to collagen production, supporting joint and skin health, both of which are vital for athletes and active individuals.*
Together, these nutrients create a formula that addresses hydration at a deeper level, supporting the brain, body, and immune system — all without sugar crashes.*
So Why Are There Vitamins in an Electrolyte Formula?
At first glance, electrolytes and vitamins might seem like two different worlds — one focused on hydration, the other on general nutrition.
But here’s the connection: true hydration isn’t just about replacing water and minerals. It’s about optimizing the way your cells use that water.
B vitamins — like B3 (niacin), B6, and B12 — play a critical role in cellular energy production, supporting the mitochondria that power your cells.
Hydration and energy production are tightly linked; without adequate B vitamins, your cells can’t efficiently generate the energy needed for muscle contractions, nerve signaling, and recovery (6, 8).
Vitamin C, meanwhile, acts as a potent antioxidant, protecting cells from oxidative stress that can be elevated during physical exertion and dehydration (9). It also supports collagen production for healthy joints and skin — critical for athletes and active individuals.
In short: hydration isn’t just about replacing what you sweat out — it’s about ensuring your body can “use” the hydration effectively.
Adding targeted vitamins amplifies the benefits of electrolytes, helping to fuel performance, recovery, and resilience from the inside out.
Hydration, Upgraded: Smarter Ingredients for Smarter Performance
Research shows that properly formulated hydration products improve fluid retention, exercise capacity, and reduce fatigue (3, 10).
Adding magnesium into the mix has also been associated with reduced muscle cramping and enhanced athletic performance (7).
Meanwhile, B vitamins and magnesium have been linked to improved cognitive performance and reduced stress in healthy adults (8, 11).
Emerging studies even suggest that maintaining optimal hydration can positively impact mood and cognitive function, particularly under physical or environmental stress (10).
Simply put, hydration isn’t just about replacing what you lose — it’s about giving your body and brain what they need to perform at their best.
With Smart Electrolytes, you get:
Faster rehydration and better muscle recovery*
Sustained mental clarity and reduced brain fog*
Immune system support without sugar spikes*
Enhanced metabolic support and better cardiovascular health*
All with a clean, sugar-free formula.
When to Use Smart Electrolytes
During Exercise: Replenish lost electrolytes and support recovery after workouts.*
Daily Hydration: Combat everyday dehydration and support brain performance — perfect for busy professionals, students, and travelers.*
Keto & Low-Carb Lifestyles: Stay hydrated without compromising your dietary goals — Smart Electrolytes has zero sugar and no artificial additives.*
High-Stress Situations: Hydration isn’t just for athletes. Stress increases your body’s demand for magnesium and B vitamins.* Smart Electrolytes helps replenish these vital nutrients keeping you sharp, alert, and on your game.*
The Bottom Line: Hydrate Smarter, Feel Better
Smart Electrolytes isn’t just an electrolyte drink — it’s a smarter way to hydrate.* By combining essential electrolytes with brain-boosting nutrients, it offers a more complete approach to hydration, energy, and recovery.*
Say goodbye to sugar crashes, bloating, and brain fog.*
Say hello to smarter hydration — and a better, brighter you.*
At BrainMD, we’re dedicated to providing the highest quality supplements to improve your physical health and overall well-being. For more information about Smart Electrolytes and our full list of brain healthy supplements, please visit us at BrainMD.
*These statements have not been evaluated by the FDA. This content is for informational purposes only. It is not meant to substitute for medical or healthcare advice from a physician, nor is it intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before beginning a new health regimen.
References:
1. Cheuvront SN, Carter R III, Sawka MN. Fluid balance and endurance exercise performance. *Curr Sports Med Rep*. 2003;2(4):202–208. doi:10.1249/00149619-200308000-00006.
2. Colgan M. *Optimum Sports Nutrition: Your Competitive Edge*. Advanced Research Press; 1993.
3. Orrù S, Imperlini E, Nigro E, et al. Role of Functional Beverages on Sport Performance and Recovery. *Nutrients*. 2018;10(10):1470. doi:10.3390/nu10101470. PMID: 30308976; PMCID: PMC6213308.
4. Choi D, Cho J, Koo J, Kim T. Effects of Electrolyte Supplements on Body Water Homeostasis and Exercise Performance during Exhaustive Exercise. *Applied Sciences*. 2021;11(9093). https://doi.org/10.3390/app11199093.
5. Morris MS. The role of B vitamins in preventing and treating cognitive impairment and decline. *Adv Nutr*. 2012;3(6):801-812. doi:10.3945/an.112.002535. PMID: 23153734; PMCID: PMC3648704.
6. Noah L, Dye L, Bois De Fer B, et al. Effect of magnesium and vitamin B6 supplementation on mental health and quality of life in stressed healthy adults: Post-hoc analysis of a randomized controlled trial. *Stress Health*. 2021;37(5):1000-1009. doi:10.1002/smi.3051.
7. Moretti A. What is the role of magnesium for skeletal muscle cramps? A Cochrane Review summary with commentary. *J Musculoskelet Neuronal Interact*. 2021;21(1):1-3. PMID: 33657750; PMCID: PMC8020016.
8. Kennedy DO. B Vitamins and the Brain: Mechanisms, Dose and Efficacy—A Review. *Nutrients*. 2016;8(2):68. doi:10.3390/nu8020068.
9. Carr AC, Maggini S. Vitamin C and Immune Function. *Nutrients*. 2017;9(11):1211. doi:10.3390/nu9111211. PMID: 29099763; PMCID: PMC5707683.
10. Adams JD, Karpinski A. Hydration status influences mood and cognitive function. *Biol Sport*. 2022;39(4):1047-1055. doi:10.5114/biolsport.2022.109234.
11. Smith AD, Refsum H. Homocysteine, B vitamins, and cognitive impairment. Annu Rev Nutr. 2016;36:211-239. doi:10.1146/annurev-nutr-071715-050947. PMID: 27296501.
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