Unless the product is USDA Certified Organic, we advise avoiding foods containing natural flavors. Also, if you are following a vegan or vegetarian diet, we advise avoiding foods containing natural flavors. Details below.
What are they, actually?
According to the United States Food and Drug Administration (FDA), “The term natural flavor or natural flavoring means the essential oil, oleoresin, essence or extractive, protein hydrolysate, distillate, or any product of roasting, heating or enzymolysis, which contains the flavoring constituents derived from a spice, fruit or fruit juice, vegetable or vegetable juice, edible yeast, herb, bark, bud, root, leaf or similar plant material, meat, seafood, poultry, eggs, dairy products, or fermentation products thereof, whose significant function in food is flavoring rather than nutritional. Natural flavors include the natural essence or extractives obtained from plants listed in 182.10, 182.20, 182.40, and 182.50 and part 184 of this chapter, and the substances listed in 172.510 of this chapter.” (21CFR101.22)
In short, the single “natural flavor” listed on a label of a product can contain any number of the permitted ingredients that are listed and linked in the above paragraph. That’s a lot of potential ingredients!
Oleoresins, Essences and Extracts
Solvents are required to extract flavors in the creation of oleoresins, essences and extracts. The list of permitted solvents in USDA Certified Organic natural flavors must be non-GMO and may include:
- Carbon dioxide
- Essential oil
- Ethanol
- Vegetable oils
- Water
The list of permitted solvents in natural flavors that may be used in conventional products (not USDA Certified Organic) is larger. In addition to the above list (which may include essential oils, ethanol and vegetable oils derived from genetically modified sources instead of organic sources), the following are some of the solvents that are permitted:
- Freon
- Hexane
- Propane
- Triglycerides
The USDA Certified Organic seal does carry with it some protection. According to Quality Assurance International, an organic certifier, natural flavors used in USDA Certified Organic products cannot contain any genetically modified ingredients, chlorinated solvents, halogenated solvents or hydrocarbon solvents.
Protein Hydrolysate and Enzymolysis
These are big words that describe turning one substance into another by breaking bonds between molecules. This is done using water, acid, alkali or enzymes. A list of some of the enzymes permitted by the FDA along with their specific purposes can be found here. Some include:
- Malt from barley
- Papain derived from papaya
- Catalase from cow liver
- Bromelain derived from pineapples
If an enzyme contains genetically modified ingredients, it cannot be used in a natural flavor for USDA Certified Organic products.
Sources
http://www.differencebetween.info/difference-between-essence-and-extract
https://medical-dictionary.thefreedictionary.com/protein+hydrolysate
http://www.qai-inc.com/media/docs/natural_flavor_questionnaire.pdf
https://www.fda.gov/Food/IngredientsPackagingLabeling/GRAS/EnzymePreparations/default.htm
“EXTRACTS”, British Pharmacopoeia, 2009, ISBN 978-0-11-322799-0
George A. Burdock (2010), Fenaroli’s Handbook of Flavor Ingredients (6th ed.), Taylor & Francis, ISBN 978-1-4200-9077-2