Probably 10 years ago, I decided to take a level half teaspoon of non-aluminum baking soda mornings and evenings as a supplement. I took it for about 2.5 years. It must have really helped my bowels because my regularity greatly improved in the years during and ever since taking the baking soda, so a person could just start with baking soda and add the flours and fibers after the bowels start moving.
I was constipated for much of my life. It's a difficult and stubborn problem to have. Now I stay regular by taking these things first thing in the morning and the triphala capsule evenings:
1/8 level cup whole rye flour. Rye decreases bowel transit time.
2 level teaspoons dietary fiber cellulose powder. This adds about 4 grams of fiber.
Six 350 mg capsules of apple pectin. This congeals everything together in the bowels.
For the powders/flours, I just put one powder/flour in my mouth using a eighth cup measure, add some water to my mouth, let it soak in and swallow with additional water.
I discontinued/deleted the barley flour because I thought it slowed my bowel transit time.
I did add a 500 mg capsule of triphala evenings which is a blend of 3 Indian fruits known to assist regularity.
Also, at lunch I have one or two 12 oz glasses of bottled 100% fruit juice. This supplies potassium for peristalsis and it definitely helps me with regularity.