Digestion (bowel) improvement and Vyvanse

I have had digestive (bowel) problems all my life. I won't get specific, but I'm sure you can figure out what I mean. Since I've started Vyvanse about a month or so ago, I have noticed I am having a bowel movement every day and it's solid, if you know what I mean. I feel complete as well. This has never happened before - I was lucky to have a bowel movement once every 3 days or a week, if I was lucky. I also had a host of other digestive issues that have all but almost completely disappeared too. I didn't notice this until about a week or so ago and it was subtle in me realizing this was happening. I feel so much better just because of that, in addition to having more focus and concentration and just a general calmness. Not like medicated/stoned calm - just normal if that makes sense. Has anyone else noticed this happening to them too?