Does LaCroix Use Chemicals in Its Flavored Sparkling Water?

November 11, 2025 •

3 min read

In 2018, a class-action lawsuit filed against LaCroix's parent company, National Beverage Corp., created widespread consumer concern, specifically over the use of ingredients that the lawsuit referred to as synthetic chemicals. This prompted many to ask, "Does LaCroix use chemicals?" The company has since refuted these claims, stating that its flavors are 100% natural, and the lawsuit was eventually dismissed. The controversy highlights broader public confusion about food labeling and what constitutes a 'natural flavor' in a nutrition diet.

Quick Summary

Examines the composition of LaCroix sparkling water, clarifying the source and safety of its so-called 'natural flavors' following a 2018 lawsuit. Explores the ingredients, addresses concerns about specific compounds like linalool and limonene, and compares LaCroix's nutritional profile to that of soda and plain water.

Key Points

Natural vs. Synthetic Flavors: LaCroix states its flavors are derived from natural essence oils, but the term 'natural flavor' is broadly defined by the FDA, allowing for proprietary blends.
Debunked Chemical Claims: Past claims that LaCroix contained dangerous chemicals like linalool and limonene were based on misinformation; these are naturally occurring compounds present in many plants.
PFAS Contamination: Some brands of sparkling water, including LaCroix, have been found to contain trace amounts of "forever chemicals" (PFAS), though levels are typically low.
Healthier than Soda: LaCroix is a superior alternative to sugary sodas for weight management and overall health, offering hydration without calories or artificial sweeteners.
Considerations for Dental Health: The carbonic acid in sparkling water can cause minor enamel erosion over time, though it is far less damaging than sugary drinks.
Hydration and Moderation: LaCroix provides effective hydration, but those with concerns can stick to plain water or flavor it themselves with fresh fruit for maximum purity.

Unpacking the Ingredients in LaCroix

At the heart of the confusion surrounding LaCroix is its ingredient list, which typically consists of only two items: carbonated water and "natural flavor". The company asserts that the natural flavors are derived from the essence oils of the named fruit. However, the term "natural flavor" is a broad, proprietary term regulated by the FDA, allowing companies to protect their flavor formulations. This lack of transparency has led to speculation and public distrust.

The 'Natural Essence' Controversy

During the 2018 lawsuit, certain naturally occurring compounds found in the flavor essences were singled out and misconstrued.

Linalool: A naturally occurring terpene alcohol found in over 200 plant species, including flowers, spices, and fruits. The lawsuit referred to its use in cockroach insecticide, but industry experts point out that just because a compound has multiple applications does not make it unsafe for consumption. The dose is what matters, and the amount in LaCroix is minuscule and far below any level of concern.
Limonene: A naturally occurring chemical found in citrus fruits. The lawsuit alleged it could cause kidney toxicity and tumors, but this claim was based on studies involving high concentrations tested only on male rats. The FDA generally recognizes limonene as safe for human consumption.

The Reality of "Forever Chemicals" (PFAS)

While the original chemical allegations against LaCroix were based on misinformation, a more recent concern has emerged about per- and poly-fluoroalkyl substances (PFAS), or "forever chemicals," potentially found in sparkling waters.

PFAS are man-made chemicals used in products to resist heat, oil, and water.
They have been detected in trace amounts in some bottled and tap water, including certain brands of sparkling water.
Some studies have linked PFAS exposure to health problems, including altered immune and thyroid function.
A Consumer Reports study found trace amounts of PFAS in LaCroix and other popular brands, though the levels were often low and below EPA recommendations at the time of testing. Consumers concerned about PFAS can opt for brands that use reverse osmosis during production, which helps filter these chemicals out.

LaCroix in Your Nutrition Diet

For many, LaCroix serves as a healthier alternative to sugary soft drinks, providing hydration with zero calories and zero artificial sweeteners.

LaCroix vs. Alternatives


Feature	LaCroix Sparkling Water	Sugary Soda	Plain Water
Calories	0	High (typically 140+ per 12oz can)	0
Added Sugar	0	High (typically 39g+ per 12oz can)	0
Artificial Sweeteners	0	Often present in diet versions	0
Hydration	As effective as plain water	Can be less hydrating due to high sugar	Excellent, standard for hydration
Dental Health	Minimally erosive, though carbonation can affect enamel over time	Highly erosive due to high sugar and phosphoric acid	Neutral pH, best for dental health
Weight Management	Can aid by replacing high-calorie drinks	Contributes to high calorie intake and weight gain	Essential for weight management

Potential Drawbacks of Sparkling Water

Despite its benefits over soda, sparkling water isn't without potential considerations, especially for sensitive individuals:

Tooth Enamel Erosion: The carbonation creates a weak carbonic acid that can, over time, minimally erode tooth enamel. Brushing your teeth later and not sipping all day can mitigate this.
Digestive Issues: For some with sensitive digestive systems, the carbonation can cause bloating or gas.

Conclusion

While a past lawsuit raised alarms about whether LaCroix uses chemicals, the claims regarding specific compounds like linalool and limonene being dangerous or synthetic were largely unfounded and misconstrued. These are naturally occurring substances used in tiny, safe concentrations. LaCroix is a healthy, calorie-free, and sugar-free alternative to soda, and a good option for those on a healthy nutrition diet looking to increase hydration. However, as with many processed foods, the "natural flavor" label remains a point of ambiguity. For those with concerns about the unknown aspects of flavoring or potential trace contaminants like PFAS, simple, unflavored carbonated water or self-flavoring with fresh fruit remains the most transparent and arguably healthiest option. Ultimately, LaCroix and other flavored sparkling waters can be part of a balanced diet when consumed in moderation, especially as a replacement for high-sugar beverages. For those seeking absolute purity, plain water or self-infused alternatives are best. For more on general nutrition, see the Harvard T.H. Chan School of Public Health's guide to a healthy eating plate.

Frequently Asked Questions

No, LaCroix sparkling water contains zero calories, zero sweeteners, and zero sodium.

LaCroix states that its flavors come from "natural essence oils" extracted from the named fruit. These are concentrated compounds derived from natural sources, but the specific composition is proprietary.

No, this is a sensationalized and debunked claim. The compound in question, linalool, is found naturally in many plants (including basil and lavender) and was mischaracterized in a lawsuit because it is also used in some insecticides.

While the carbonic acid in all sparkling water can minimally erode tooth enamel over time, it is far less harmful than the sugar and acids found in soda. Moderate consumption is unlikely to cause major issues.

Yes, for many people, switching from high-calorie, sugary sodas to a zero-calorie option like LaCroix can aid in weight management by reducing overall calorie intake.

Some testing has shown trace amounts of PFAS in LaCroix and other sparkling water brands, though typically at levels below current health advisories. Brands that use reverse osmosis in production often have lower levels.

LaCroix is just as hydrating as plain water, but its added flavors may slightly increase its acidity. For those who prefer a taste, it’s a healthy substitute, but plain water remains the most neutral and purest option.