Hello Barb,
I would continue with the Veinsmart.
There are actually many possible factors that can cause constipation such as low fiber, low water, not enough exercise, medications, nutrient deficiencies, stress, a low functioning thyroid,a slow functioning liver, or even irritation of the digestive tract.
I would start with the simple ones. Increase water, increase fiber(fruits, veg, whole grains, ground organic flax seeds), chew your food and increase exercise. Buckwheat is a great food for veins, I would include it in your diet. You can you use it in place of rice, or even in place of oatmeal at breakfast. You may also want to try starting each day with a warm (or at least room temp) glass of lemon water, to get your system going (especially your liver).
Supplements such as magnesium, b vitamin and vitamin C are also helpful with constipation. Lorna's Magsmart uses magnesium biglycinate, which is a great form for keeping everything running smooth without causing diarrhea.
I would avoid caffeine. It will irritate your digestive tract in the long run and may cause more problems.
You likely need to address your whole digestive tract. I would make sure you are chewing your food very well, eating while calm and do not eat on the run. Avoid cold drinks near your meals as this can shock digestion. You may also want to try probiotics and digestive enzymes. Pay attention to how you feel after eating, are there foods that cause issues for you?
I hope you do not feel overwhelmed by my suggestions. Only include as many as you feel comfortable with, even if that means one at a time.
And finally, please DO NOT use Metamucil. The ingredient list is not good. It contains artificial sweeteners and colours. There are much better options out there that do not include such anti-nutrients.
I hope that helps!!