Developing a heme iron database for meats according to meat type, cooking method and doneness level

Area of Science:

• Nutritional Science
• Biochemistry
• Cancer Research

Background:

• Animal and human studies suggest iron, particularly heme iron, may be linked to carcinogenesis.
• Heme iron can promote the formation of N-nitroso compounds, which are known carcinogens.

Purpose of the Study:

• To investigate the association between heme iron intake and cancer risk.
• To accurately estimate heme iron intake by measuring heme iron levels in various meats and cooking conditions.
• To develop a heme iron database for use with food frequency questionnaires.

Main Methods:

• Heme iron content was measured in composite meat samples representing different meat types, cooking methods, and doneness levels.
• Atomic absorption spectrometry and inductively coupled plasma-atomic emission spectrometry were used for heme iron quantification.

Main Results:

• Steak and hamburgers exhibited the highest heme iron concentrations.
• Pork and chicken thigh meat had intermediate levels, while chicken breast meat had the lowest.
• Cooking method and doneness level did not show a clear effect on heme iron levels.

Conclusions:

• Accurate estimation of heme iron intake is essential for understanding its role in disease, particularly cancer.
• A heme iron database has been developed to improve the accuracy of dietary assessments.
• Further research can utilize this database to explore the relationship between heme iron intake and health outcomes.