Our profitability depends in part on our ability to anticipate and react to changes in the cost of food, supplies, labor, construction and utilities. In 2023, the costs of certain commodities, labor, and other inputs necessary to operate our restaurants have increased. In addition, we are susceptible to increases in food costs as a result of factors beyond our control, such as general economic conditions, seasonal economic fluctuations, weather conditions including wildfires and flooding, global demand, food shortages, food safety concerns, infectious diseases, fluctuations in the U.S. dollar, cyber-attacks, transportation issues, product recalls, and government regulations, including tariffs and other import restrictions on foreign produce and other goods. In 2022 and continuing into 2023, for example, we experienced inflationary pressures due to supply chain disruptions that adversely impacted and may continue to adversely impact our business and results of operations. Environmental and weather-related issues, which have been exacerbated by climate change, such as freezes, drought, wildfires, hurricanes and flooding, may also lead to increases, temporary or permanent, or spikes in the prices of some ingredients, such as produce and meat. Any increase in the prices of the ingredients most critical to our menu, in particular chicken, as well as corn, cheese, avocados, beans, rice, and tomatoes, could adversely compress our margins, or cause us to raise our prices, reducing customer demand. Alternatively, in the event of cost increases with respect to one or more of our raw ingredients, we might choose to temporarily suspend serving menu items, such as guacamole or one or more of our salsas, rather than pay the increased cost. Additionally, as a substantial volume of produce and other items are procured from Mexico, and occasionally other countries including Chile and Peru, any new or increased import duties, tariffs or taxes, or other changes in U.S. trade or tax policy could result in higher food and supply costs that would adversely impact our financial results. Any such changes to our menu prices or available menu could negatively impact our restaurant transactions, business, and comparable restaurant sales during the shortage and thereafter.
Our principal food product is chicken. In fiscal 2023, 2022, and 2021, the cost of chicken included in our product cost was approximately 10.0%, 11.0%, and 9.9%, respectively, of our revenue from company-operated restaurants. Material increases in the cost of chicken could materially and adversely affect our business, operating results, and financial condition. Changes in the cost of chicken are impacted by a number of factors, including seasonality, increases in the cost of grain, disease, and other factors that affect domestic and international supply of and demand for chicken products. Additionally, environmental and animal rights regulations or voluntary programs have in the past led to increases, and could lead to future increases in, the cost or supply of chicken and other foods. We often ask our suppliers to use fixed price contracts or other financial risk management strategies to reduce potential price fluctuations in the cost of chicken and other commodities. We have implemented menu price increases in the past to significantly offset increased chicken prices, due to competitive pressures and compressed profit margins. We may not be able to offset all or any portion of increased food and supply costs, or labor, construction and utility costs through higher menu prices in the future. If we implement further menu price increases in the future to protect our margins, average check size and restaurant transactions could be materially and adversely affected, at both company-operated and franchised restaurants.