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Citric acid is found naturally in lemons, limes, and other fruits. It also appears as an added ingredient in drinks, candy, and packaged foods. That raises a reasonable question: is citric acid bad for you?
The short answer: Citric acid is generally considered safe at the levels used in food. It is not inherently dangerous because it was commercially produced, and it is not automatically healthier because it came from a lemon. The more relevant questions are how often you consume acidic products, what else is in them, and what a product's ingredient list tells you. If you are comparing drinks in the store, our fruit drink vs. juice vs. lemonade guide explains how to compare the complete label instead of focusing on one ingredient.
Is Citric Acid Safe to Eat or Drink?
Yes, for its intended uses. The U.S. Food and Drug Administration has affirmed citric acid as generally recognized as safe (GRAS) for use in food under good manufacturing practice. This conclusion concerns the safety of the ingredient as it is used in food—not a promise that every acidic beverage is beneficial to health.
The FDA explains that a GRAS determination must meet the same basic safety standard as an approved food additive: a reasonable certainty of no harm under the intended conditions of use.
Citric acid is not an alternative name for lemon juice. It is one compound naturally present in citrus, whereas lemon juice also contributes water, aroma compounds, and other constituents.
Where Does Added Citric Acid Come From?
Much of the citric acid used commercially is produced by microbial fermentation rather than by squeezing lemons. A common production organism is Aspergillus niger, a fungus used in industrial manufacturing. After fermentation, the citric acid is separated and purified.
The process may sound surprising, but the manufacturing organism and the finished, purified ingredient are not the same thing. The fact that a fungus was used in manufacturing does not, by itself, show that the citric acid is unsafe. A 2025 scientific review describes A. niger as the principal organism used in large-scale citric acid production.
Whether it occurs in fruit or is produced commercially, citric acid is the same chemical compound. The distinction is meaningful when comparing whole ingredients and flavor profiles; it is not evidence that one form is inherently toxic.
What Are the Actual Health Considerations?
1. Frequent exposure to acidic drinks and dental enamel
Acidic drinks can contribute to dental erosion when teeth are exposed to them frequently. This includes drinks whose acidity comes from added citric acid and drinks made with naturally acidic citrus juice.
According to the American Dental Association, the frequency and duration of acid exposure matter. Drinking an acidic beverage with a meal, avoiding prolonged sipping, and rinsing with water afterward can help reduce repeated exposure. You do not need to single out commercially produced citric acid to understand this risk.
2. Citric acid is not the same as added sugar
The words citric acid and sugar describe different ingredients. Citric acid contributes tartness; sweeteners contribute sweetness. A drink can be acidic and low in sugar, acidic and high in sugar, or somewhere between. Check the Nutrition Facts panel for added sugars rather than drawing conclusions from acidity alone.
3. Claims about special reactions deserve context
Occasional reports of sensitivity to particular foods exist, but there is not strong evidence that normally used, food-grade citric acid causes widespread headaches, joint pain, or other systemic symptoms. Individual experiences are worth discussing with a healthcare professional, especially when symptoms recur, but anecdotes do not establish a general health hazard.
Does Citric Acid Preserve Drinks?
It can contribute to a beverage's stability by adjusting acidity and influencing some oxidation reactions. However, adding citric acid alone does not make a drink safe to store at room temperature.
Safety and shelf life also depend on the full formulation, treatment process, packaging, sanitation, and storage conditions. If you're interested in how those pieces fit together, read our separate guide: Is Citric Acid a Preservative?.
What Makes Lemonicious Different?
At Lemonicious, we build our signature drinks around fresh-squeezed lemons, real fruit, teas, and botanicals, with no artificial flavors or colors. We do not add manufactured citric acid to our signature recipes as a substitute for lemon juice.
We also use high-pressure processing (HPP) as part of our validated production process. Our bottled drinks must stay refrigerated; they are not shelf-stable. The validated refrigerated shelf life is 90 days unopened, subject to the printed use-by information and proper cold storage. HPP is not a reason to leave bottles unrefrigerated.
You can review all five signature flavors, check ingredient and nutrition information, or find Lemonicious near you.
The Bottom Line: Is Citric Acid Bad for You?
For most people, food-grade citric acid used as intended is considered safe. Its commercial fermentation origin is not, by itself, a safety concern. The better way to compare beverages is to look at the complete ingredient list, sugar content, acidity, food-safety process, and storage instructions.
For Lemonicious, choosing fresh-squeezed lemons is primarily about our ingredients and flavor philosophy—not about claiming that other brands' food-grade citric acid is poisonous.