Concerns are often raised about the potential of fruit to increase liver fat due to its high sugar — particularly fructose — content.
A randomized controlled trial found that a fruit-rich diet (9.58 grams of fruit per kilogram of body weight per day) did not affect body weight or liver fat in healthy participants.[1]
In contrast, another randomized controlled trial found that a fruit-rich diet (about 7 servings of fruit per day) increased liver fat in participants with NAFLD. However, the participants also gained 7 kilograms of body weight, on average,[2] so all this study indicates is that a hypercaloric diet increases liver fat; it says nothing about whether a high intake of fruit is detrimental for people with NAFLD.
As it stands, there is an absence of evidence to indicate that a fruit-rich diet has adverse effects on liver health. In contrast, fruit can be an important component of a healthy diet: it’s rich in vitamins, minerals, polyphenols, and fiber, and the consumption of multiple servings of fruit per day is consistently associated with a reduced risk of several diseases.[3]