Despite my healthy lifestyle and diet, I am never regular in the bathroom (3 times or less per week).

It is possible that you have a condition such as irritable bowel syndrome that is causing irregular bowel movements, even with a healthy lifestyle and diet. In some cases, individuals with a slower digestive system may need to take laxatives regularly to maintain a regular frequency of bowel movements. You may want to consider trying Lax-a-Day, a tasteless and textureless powder that can be taken chronically without adverse effects. The dosage can be adjusted to achieve the desired frequency of bowel movements.