GC–MS Profiling of Volatile Compounds in Chicken Breast Treated with Different Iron Forms

Iron compounds in meat change when it is cooked, but it is still not fully understood how they influence flavor. In this study, researchers added different forms of iron to chicken breast—free iron, heme iron, and iron bound in proteins—to compare how each one affects taste and aroma. The resulting flavors were then analyzed using gas chromatography–mass spectrometry (GC-MS) and an electronic nose system to detect differences in the volatile compounds produced. A paper based on this research was published in Food Research International.¹

How is Meat Flavor Formed?

Flavor is one of the most important qualities people look for in food. Animal meat is still the main source of protein in most diets, while plant-based meat alternatives (PBMAs) are seen as an important option for the future. However, compared with animal meat, plant-based alternatives often fall short when it comes to taste, aroma, and overall eating experience.^2,3

The flavor of meat products mainly develops through a few key processes, including the Maillard reaction (a browning process), the breakdown of fats, and the breakdown of the vitamin thiamine.⁴ “Therefore,” write the authors of the paper,¹ “a comprehensive analysis of the flavor formation mechanisms in animal meat, along with the identification of key flavor compounds, can provide essential theoretical foundations and technical guidance for the precise simulation of PBMA flavors.”

One major difference between animal meat and PBMAs is that plant-based versions do not contain heme iron–rich proteins like myoglobin and hemoglobin. In animal meat, these proteins play an important role in giving meat its color, texture, and flavor. Scientists have studied myoglobin and hemoglobin in detail and have formulated an understanding of how they influence the appearance and taste of meat.^5,6 While these and other studies indicated that myoglobin and hemoglobin exert multifaceted effects on meat, research focusing on its role in flavor development, in the opinion of the research team, remained limited and warranted thorough examination.¹

What Role Do Different Types of Iron Play in Meat Flavor Formation?

The results showed that different types of iron affect flavor in different ways. Heme iron was linked to the formation of more alcohol-like flavor compounds and caused only mild oxidation in the chicken. In contrast, free iron sped up fat breakdown much more strongly, leading to the production of many strong-smelling compounds such as hexanal and heptanal. Hemoglobin, which contains both free and heme iron, had a combined effect—enhancing fat breakdown while also increasing alcohol-related flavor compounds.¹

“This study,” wrote the authors of the paper,¹ “deepened the understanding of the role of iron in the formation of meat flavor and would provide some references for the application of different iron forms in flavor regulation of meat or meat-flavored foods.”

The researchers indicated that their study mainly looked at how three different types of iron affect flavor by focusing on how they break down fats, and more research is needed to fully understand exactly how these processes work. Specifically, it is still unclear why heme iron leads to more alcohol-related flavors, how the protein part of hemoglobin contributes, and how different iron types may influence other ways that flavor compounds are formed.¹

Read More on Similar Topics
Analyzing Flavor Deterioration in Wooden Breast Chicken Using Chromatography

References

1. Yin, Y.; Wang, X.; Yuan, N. et al. Modulate Meat Flavor by Different Forms of Iron with Chicken Breast as a Aodel. Food Res Int. 2026, 236, 119230. DOI: 10.1016/j.foodres.2026.119230
2. Guo, R.; Huang, Y.; Shang, J. et al. The Role of Oil Forms in Extrusion for Plant-Based Meat Analog Design: A Review. Trends Food Sci. Technol. 2025, 105228. DOI: 10.1016/j.tifs.2025.105228
3. Li, E.; Zhang, Y.; Zhang, X. et al. Improving Physicochemical and Sensory Properties of Plant-Based Meat Patties with Canola Oil Oleogels: A Sustainable Fat Alternative. J. Future Foods 2026. DOI: 10.1016/j.jfutfo.2025.07.011
4. Ali, S.; Liao, Z.; Cheng, Y. et al. Lipidomics in Chicken Meat Flavor Chemistry: Current Understanding, Integrated Omics Approaches, and Future Perspectives. Poult. Sci. 2025, 104( 11), 105700. DOI: 10.1016/j.psj.2025.105700
5. Yang, X.; Zhu, L.; Jiang, W. et al. Artificial Intelligence-Driven Food Quality Prediction: Applying Machine Learning Ensemble Models for Dynamic Forecasting of Pork pH and Meat Color Changes. Food Chem. 2025, 492, 145383. DOI: 10.1016/j.foodchem.2025.145383
6. Yancey, E. J.; Grobbel, J. P.; Dikeman, M. E. et al. Effects of Total Iron, Myoglobin, Hemoglobin, and Lipid Oxidation of Uncooked Muscles on Livery Flavor Development and Volatiles of Cooked Beef Steaks. Meat Sci. 2006, 73 (4), 680-686. DOI: 10.1016/j.meatsci.2006.03.013