For me I finally figured keto out fresh this year: 1 day broth fast so you feel true hunger and deplete a lot of sugar and glycogen storage After doing hard zero carb days including the feeling of constipation and than being adapted check out if you can buy keto breads they are my personal fiber secret sauce only 6 net carbs per 100 g Hopefully this helps for the beginning
I forgot to mention that I never "felt" constipated. It was more of, I didn't have bowel movements for several days at a time and when I did, it would be pretty bad with some bleeding. I didn't really use keto bread, I actually used these small keto tortillas as bread replacement on quite a lot of things and they were fantastic and tasted good.