Good Fiber Sources for a Ketogenic Diet

[GrowthSpurt1]

I'm about to go on a Ketogenic Diet, Bodyopus to be exact. I did it several years ago with great results. I'm looking for a good source of fiber that I can take in during my no carb days, even a good fiber supplement. Has to be straight fiber and no carbs from any other source. Any suggestions?

 

[GrowthSpurt1]

Found a good one. Psyllium seed Husk capsules. Spinach leaves are good too.