Dietary Exposure and Risk Assessment for L-Ergothioneine in China

Area of Science:

• Nutritional Science
• Toxicology
• Food Safety

Background:

• L-Ergothioneine (L-EGT) is a bioactive compound found in edible fungi with potential health benefits.
• Limited data exists on population-level dietary exposure to L-EGT.
• Understanding L-EGT exposure is crucial for assessing its health implications.

Purpose of the Study:

• To estimate dietary exposure to L-EGT among Chinese residents.
• To analyze L-EGT exposure distribution across demographics and regions.
• To identify major food sources of L-EGT and assess associated risks.

Main Methods:

• Utilized a large dataset of 42,218 participants with dietary recalls.
• Estimated body-weight-normalized L-EGT intake using food concentration data.
• Calculated Margin of Exposure (MOE) based on toxicity studies (NOAEL = 800 mg/kg bw/d).

Main Results:

• Mean L-EGT exposure was 0.043 mg/kg bw/d (MOE = 18,605) for the general population and 0.174 mg/kg bw/d (MOE = 4598) for consumers.
• 95th percentile exposures were 0.244 mg/kg bw/d (MOE = 3279) and 0.644 mg/kg bw/d (MOE = 1242), respectively.
• MOE values consistently exceeded the safety threshold of 300, indicating low risk.

Conclusions:

• Current natural dietary exposure to L-Ergothioneine in China is low and poses no safety concerns.
• Provides essential baseline data for future research on L-EGT health effects and safety.
• Supports the safety of typical dietary intake levels of L-EGT.