Oranges, grapefruits, lemons, and other citrus fruits are highly acidic and can irritate the stomach lining, potentially causing heartburn or acid reflux when eaten on an empty stomach.
Though botanically a fruit, tomatoes are often used as vegetables in culinary contexts. They are also acidic and may cause gastrointestinal discomfort when consumed on an empty stomach.
Pineapples contain bromelain, an enzyme that may cause digestive issues or sensitivity in some individuals if eaten alone on an empty stomach.
Papayas contain papain, an enzyme that can lead to digestive problems if consumed on an empty stomach.
Watermelon has a high glycemic index and eating it on an empty stomach may cause a rapid increase in blood sugar levels.
Figs are relatively high in natural sugars and can lead to blood sugar fluctuations if consumed alone on an empty stomach.
Bananas are high in natural sugars and can cause a quick spike in blood sugar levels when eaten alone on an empty stomach.
Apples are also acidic and may cause discomfort when eaten on an empty stomach, especially if you are prone to acid reflux.
Grapes are high in sugar and may cause a sudden increase in blood sugar levels if eaten on an empty stomach.
Guavas are rich in dietary fiber and can cause digestive issues if eaten in large quantities on an empty stomach.