I had horrible, horrible constipation most of my life. When I was 40 years old, I say a naturopath. He discovered I had severe heavy metal toxicity; I chelated. He discovered that I had several food allergies/intolerances. I stay away from eating those foods. He discovered I had severe Leaky Gut and malabsorption because the wrong foods I was eating were affecting my gut, so I took specific nutriceuticals to repair my gut. He discovered that I had various mineral, enzyme, vitamin, amino acid deficiencies, which we took care of through supplements. I changed my diet to organic and installed a R/O water filtration system. I drastically changed what I ate, how I ate (only use cast-iron), what I drank, etc., etc.
It has now been 5 years since I made all these changes. I do not take anything to help me be regular. Getting my body healthy and in line and then continuing to eat and drink healthy has allowed my body to naturally repair itself. I have at least one bowel movement a day now, sometimes two.
This is from someone who was lucky if I had one bowel movement a week, sometimes in two weeks. So I definitely know where you're coming from. Seeing a Naturopathic doctor and completely changing how I eat completely changed my life. The biggest change is that I'm now regular--without taking anything to "help" my intestines or keep me regular--and I feel the best I've ever felt.