Nutrition 4 Foods You Should Not Eat On An Empty Stomach – Healthy Breakfast Prev Article Next Article 4. Citrus fruits A big glass of orange juice for breakfast? Sounds healthy, but it is not on an empty stomach: the acid in citrus fruits can lead to heartburn. An exception is lemon water because the juice in it is strongly diluted with water. PrevNext Prev Article Next Article Related Posts The Best Milk for Weight Loss: Top 10 What Is Metabolic Flexibility And How To Become Metabolically Flexible Exercises to train your abdominal muscles | No crunches