Why Is that the health of Morgan's liver declines the most during this project From movie super size me?

In "Super Size Me," Morgan Spurlock's liver health declines significantly due to his exclusive consumption of fast food from McDonald's for 30 days. The high levels of saturated fats, sugars, and sodium in the fast food diet lead to rapid weight gain, increased cholesterol, and liver strain. Additionally, the lack of nutrients and the excessive calories contribute to the development of fatty liver disease, which is exacerbated by his sedentary lifestyle during the experiment. This drastic dietary change highlights the negative impacts of fast food on overall health.