The kidneys help remove excess potassium from the blood. When kidney function is significantly reduced, potassium can build up in the body.
People with chronic kidney disease may therefore be advised to monitor potassium intake depending on their individual blood levels and treatment plan.
Bananas are a potassium-containing food, but they are not automatically off-limits.
If you've been told that your potassium is high or that you need to follow a potassium-restricted diet, ask your healthcare professional how bananas fit into your eating plan.
4. Bananas can contribute to a fiber-rich diet
As people get older, maintaining a nutritious diet with enough fiber becomes increasingly important.
Bananas contain dietary fiber, although the amount varies with size and ripeness.
Fiber supports digestive health and can help contribute to a balanced eating pattern when combined with other fiber-rich foods such as vegetables, beans, whole grains, nuts, and other fruits.
5. A banana isn't a complete meal
One common mistake is treating fruit as a full meal.
A banana provides carbohydrates and several micronutrients, but it doesn't provide much protein.
For a more satisfying breakfast or snack, you could combine a banana with foods such as plain yogurt, nuts, seeds, or another protein-rich option, depending on your dietary needs.
This can make the meal more nutritionally balanced.
6. Portion size still matters
More isn't always better—even when a food is nutritious.
A large banana contains more carbohydrates and calories than a small one.
For older adults managing blood sugar, weight, or overall calorie intake, portion size can matter.
Instead of asking, “Are bananas good or bad after 70?” a better question is: