Relevant essential oil components: a minireview on increasing applications and potential toxicity

Area of Science:

• Food Chemistry
• Toxicology
• Natural Products

Background:

• Carvacrol, thymol, eugenol, and vanillin are well-studied phenolic compounds from essential oils.
• These compounds possess significant biological properties, including antimicrobial and antioxidant activities.
• They are widely used in food and non-food products, with increasing application potential.

Purpose of the Study:

• To review the potential toxicological effects of carvacrol, thymol, and eugenol.
• To assess the safety of these widely used essential oil components.
• To highlight the need for revised risk assessments concerning increased exposure.

Main Methods:

• Review of in vitro and in vivo studies.
• Analysis of case reports on human exposure.
• Examination of toxicological data from animal models.

Main Results:

• Carvacrol, thymol, and eugenol exhibit potential toxicological effects, primarily through oxidative stress.
• Mutagenic and genotoxic effects have been observed for these compounds.
• Adverse effects include skin irritation, inflammation, and organ damage in animal studies; vanillin shows toxicity at high concentrations.

Conclusions:

• While beneficial, carvacrol, thymol, and eugenol present toxicological risks.
• Increased human and environmental exposure necessitates a thorough re-evaluation of their safety.
• Balancing the benefits and risks of these versatile compounds is crucial for future applications.