Like any fiber, konjac glucomannan can cause diarrhea or constipation in excess. It is recommended that you start with a teaspoon per day and slowly increase to determine your individual tolerance. I personally consume probably at least 6 tsp a day, and often more. I suffered from Irritable Bowel Syndrome since my youth but now have no issues with my digestion. In contrast, I found that chia and flax seeds cause me extreme abdominal pain, bloating and gas and have had to eliminate them entirely from my diet.