Well its recommended that you take a fibre supplement on Cd to prevent constipation. Not sure if Benefibre is ok though. I know Psyllium husks (raw form or in Fibresure tablets) are ok, as are inulin based fibre supplements, like Cambridge's fibre89 or Fibresure powder. benefibre is 100% wheat dextrin though so really dont know? Dextrin is a carbohydrate though, so i'm thinking maybe not?