What Are Natural Flavors? Uses, Labels, and Safety Explained

Natural flavors are complex chemical mixtures derived from plant or animal sources used to standardize taste in packaged foods. Although legally sourced from nature, the final ingredients are highly processed and frequently consist mostly of carriers, solvents, and preservatives that remain undisclosed on food labels.

Key Takeaways

• Highly Processed Mixtures: Although derived from natural starting materials, natural flavors often contain solvents, emulsifiers, and preservatives that make up the bulk of the final solution.
• New 2026 Regulations: California's AB 2244 (introduced in March 2026 and signed into law in September 2026) creates a certified non-ultra-processed food (non-UPF) standard that may disqualify products with added flavors.
• Litigation Risks: Active class-action lawsuits, such as a January 2026 suit against Celestial Seasonings, challenge "all natural" claims on products using added natural flavors alongside processing aids like citric acid.
• Lack of Transparency: Under current FDA rules, companies do not have to disclose the exact proprietary components or carriers used in their flavor mixtures.

What are natural flavors?

To the average shopper, the term "natural flavor" on a package conjures images of freshly squeezed fruit juice or crushed herbs. However, the regulatory reality is far more industrial. The Food and Drug Administration (FDA) defines natural flavors as substances derived from a plant or animal source (such as spices, fruits, vegetables, herbs, bark, roots, meat, or dairy) whose significant function in food is flavoring rather than nutritional. You can view the formal legal definition on the FDA 21 CFR 101.22 registry page.

Despite their wholesome name, these ingredients are highly processed chemical mixtures. While the original flavor molecule must come from nature, the final ingredient added to your food is often processed in a laboratory. Research indicates that a single natural flavor mixture can contain up to 100 different chemical components, including hidden carrier solvents, emulsifiers, and artificial preservatives that do not need to be declared on the ingredient deck. In fact, according to the Environmental Working Group's Food Scores database, natural flavors are the fourth most common ingredient listed on food labels, behind only salt, water, and sugar. This lack of transparency has increasingly drawn criticism from consumer advocacy organizations like the CSPI Flavor Report 2024.

Why are natural flavors used in packaged foods?

Food manufacturers use natural flavors primarily to maintain consistency. When foods are processed, pasteurized, frozen, or stored on shelves for months, their natural volatile flavor compounds degrade. For example, pasteurized orange juice loses much of its organic flavor during the oxygen-removal process. To make it taste like orange juice again, manufacturers add proprietary "flavor packs" derived from orange byproducts.

Additionally, natural flavors are highly cost-effective and powerful. Typical concentrations of these mixtures range from 0.1% to 2.0% of the final product's total weight, meaning a tiny volume has a massive sensory impact. They allow companies to standardize the taste of a product across millions of units, ensuring that a chip or beverage tasted in New York tastes identical to one purchased in California. They also help mask off-notes from vitamins, plant proteins, or preservatives. Consumers looking to understand other processed food additives can read our guides on What Is Carrageenan? Uses, Safety, and Regulatory Status or find answers regarding artificial colors in What Is Red 40? Uses, Safety, and Pending FDA Regulations.

How are natural flavors made?

Creating a natural flavor is a complex process that blurs the line between nature and chemistry. First, raw agricultural materials are sourced. Flavor chemists then use physical methods like distillation, extraction, or heating, as well as biochemical methods like enzymatic fermentation, to isolate the desired volatile aroma chemicals.

Because pure flavor extracts are often highly concentrated, unstable, or insoluble in water, they must be blended with carrier solvents and stabilizers to make them usable in food production. Carrier solvents and incidental additives can make up the majority of the flavor formulation's total mass. Common carriers include propylene glycol, ethyl alcohol, or synthetic preservatives. While the starting material is natural, the extensive physical and chemical manipulation involved makes the final product highly processed.

Are natural flavors safe and how are they regulated?

In the United States, natural flavors are regulated under the Generally Recognized as Safe (GRAS) framework. This system allows the Flavor and Extract Manufacturers Association (FEMA) to evaluate flavor safety independently of direct FDA oversight. You can learn more about this evaluation process via the official FEMA GRAS Program. When swallowed, the body processes typical dietary levels of these flavor compounds through normal metabolic pathways without systemic issues. However, critics point out that the self-policing nature of GRAS can lead to conflicts of interest.

In contrast, the European Food Safety Authority manages flavor safety using a strict positive list of approved substances to prevent potential genotoxic risks, which is detailed directly on the EFSA Flavourings Platform.

Furthermore, the regulatory landscape is shifting at the state level. California's non-ultra-processed food (UPF) certification bill, AB 2244, was introduced in March 2026, passed both chambers in August 2026, and was signed into law in September 2026, with certifiers to be accredited by June 2029. Under this framework, the inclusion of added natural flavoring agents may disqualify a food from receiving certified non-UPF status. This signals a major shift toward stricter clean-label standards across the country.

Do natural flavors cause side effects, and who should avoid them?

For the vast majority of consumers, digesting small amounts of natural flavors causes no side effects. However, sensitive populations should exercise caution. Because companies are not legally required to disclose the exact ingredients in their proprietary flavor blends, individuals with severe food allergies, chemical sensitivities, or specific dietary restrictions (such as vegan or kosher diets) face hidden risks. A flavor derived from beaver glands (castoreum) or insects (cochineal) can still legally be labeled as a "natural flavor."

Additionally, while oral consumption is generally safe, inhalation of certain volatile flavoring agents poses severe industrial health risks. For example, occupational exposure to diacetyl, a natural buttery flavor compound, has been linked to bronchiolitis obliterans, a severe and irreversible lung condition known as "popcorn lung," as detailed in the official OSHA Flavoring Exposure Bulletin. There are also emerging questions about how concentrated flavor chemicals might affect human microbiota, although most of the available research, such as a 2020 study of flavored e-cigarette liquids on oral bacteria, concerns inhaled vaping products rather than food.

Aurascan label data

Our database provides a clear look at how frequently these additives appear in everyday items. Based on original Aurascan aggregate label data, "natural flavors" is a highly scanned ingredient with a sample size of 67 total scans across 26 unique products, representing 14 unique users tracking their dietary inputs.

When we analyze the products containing natural flavors, several top co-occurring ingredients emerge. The most common companion ingredients include:

• Citric acid: Found in 50 scans
• Carbonated water: Found in 48 scans
• High fructose corn syrup: Found in 42 scans
• Salt: Found in 41 scans
• Sodium citrate: Found in 41 scans

This data shows that natural flavors are rarely isolated additives. Instead, they are deeply integrated into highly processed beverage and snack formulas, frequently paired with acidity regulators, carbonation, and intensive sweeteners.

How to spot natural flavors on ingredient labels

Spotting natural flavors on a product label is usually straightforward, but decoding what they actually contain is nearly impossible. On the ingredient deck, you will typically see terms like:

• Natural flavor
• Natural flavoring
• Natural flavors
• Organic natural flavor
• Natural [Fruit] flavor (e.g., "natural strawberry flavor")

Under current FDA guidelines, if a product contains added citric acid, solvents, or emulsifiers to keep the flavor stable, these processing aids do not have to be listed separately if they function solely as part of the flavor mixture. This loophole has sparked consumer backlash. In January 2026, a class-action lawsuit was filed against Celestial Seasonings in federal court in Colorado, challenging the brand's "all natural" product claims due to the presence of added citric acid functioning alongside natural flavor mixtures.

What are healthier alternatives to natural flavors?

If you want to avoid proprietary, highly processed flavor mixtures, the best alternative is to choose whole, unprocessed foods. Preparing meals from scratch allows you to control exactly what enters your body. For sweetness and aroma, rely on whole-food ingredients rather than laboratory-designed mixtures.

Consider these simple swaps:

• Fresh citrus: Use fresh lemon, lime, or orange zest and juice instead of lemon or orange "natural flavor."
• Whole herbs and spices: Use real vanilla bean, cinnamon sticks, mint leaves, or fresh ginger to infuse beverages and baked goods.
• Dehydrated fruit powders: Ground, freeze-dried fruits provide intense flavor and natural color without any hidden carriers or solvents.
• Pure extracts: Look for organic extracts (like pure organic vanilla extract) that specify their extraction method and contain minimal ingredients.

Limitations of the evidence

Much of the research summarized here comes from laboratory, animal, or occupational-exposure studies, and dietary exposure at typical food-use levels is often far lower. Findings cannot always be generalized to every product or person, and this article is educational, not medical advice.

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