What is Lime Oil, Expressed?
Lime Oil, Expressed (CAS Number: 977059-80-5) is a volatile essential oil obtained through cold pressing or mechanical expression of the peel of lime fruit (Citrus aurantifolia and related Citrus species). Unlike distilled lime oil, expressed lime oil is produced without heat, which helps preserve heat-sensitive aromatic compounds and provides a fresher, more authentic lime flavor profile. The oil is composed primarily of limonene, β-pinene, γ-terpinene, and other monoterpenes, along with aldehydes and esters that contribute to its characteristic citrus aroma.
Common Uses
Lime Oil, Expressed is widely used in the food and beverage industry as a flavoring agent. It appears in beverages including soft drinks, alcoholic cocktails, juices, and flavored waters. In the food sector, it is incorporated into baked goods, confectionery, desserts, ice cream, yogurt, and savory products like sauces and condiments. The oil is also used in non-alcoholic flavoring preparations and as an adjuvant to enhance other flavors. Due to its potency, only small quantities—typically measured in parts per million—are required to achieve the desired lime flavor in final products.
Safety Assessment
Lime Oil, Expressed has demonstrated a favorable safety profile in food applications. The FDA has received zero adverse event reports associated with this additive and no product recalls have been issued related to its use. As a natural product derived from a commonly consumed fruit, lime oil has an extensive history of safe use in food and beverage applications across multiple countries.
The primary components of lime oil, particularly limonene, have been extensively studied and are generally recognized as safe. Limonene is present in many citrus fruits and is a GRAS (Generally Recognized as Safe) substance for flavoring purposes. The oil's aromatic compounds are volatile and present in very small concentrations in final food products, further supporting its safety margin.
When consumed in normal dietary amounts as a food flavoring, lime oil does not present significant toxicological concerns. The LD50 (lethal dose) of citrus oils in animal studies is high, indicating low acute toxicity. Chronic exposure studies of limonene and related monoterpenes support their safety at food-use levels.
Regulatory Status
Lime Oil, Expressed does not currently hold FDA GRAS status, meaning it has not undergone the formal GRAS notification process with the FDA. However, this does not indicate safety concerns; rather, it reflects that manufacturers may use this ingredient under existing regulations that permit flavoring agents derived from natural sources, or through direct FDA approval pathways.
The ingredient is permitted for use in food in numerous jurisdictions internationally, including the European Union, where it appears in the EFSA's database of approved flavoring substances. It is listed in the Code of Federal Regulations as a permitted flavoring agent in food products.
Manufacturers using Lime Oil, Expressed must ensure compliance with labeling requirements and declaration rules in their respective markets. In the United States, it would typically be declared as "Natural Flavor" or "Lime Oil" depending on processing methods and regulatory context.
Key Studies
While lime oil itself has limited dedicated research literature, its primary components have been extensively characterized. Studies on limonene—the major constituent—demonstrate its safety profile and metabolism in humans. Research published in regulatory toxicology journals confirms the GRAS status of limonene and related monoterpenes at levels used in food flavoring.
The long history of lime consumption in human diet and traditional use of lime products in beverages and foods across cultures provides additional evidence supporting the safety of expressed lime oil as a food ingredient. No significant adverse health effects have been documented from the culinary use of limes or lime-derived products in populations with normal dietary exposure.