Like anything booze drugs etc, different people respond to different strains because each person is different. It is best to try as many as you can and see what works for you. I find that one strain might work great for a week or less then will not be as effective once your body gets used to it.

As for IBS... doctors don't know shit and label people with IBS without looking into the real issue or problem. I had doctors tell me I had IBS for over 10 years and also said nothing about any allergies etc i had. I went to a Natural Path Doctor (ND) and was told I was allergic to grains as back in the 50's they genically modified them in North America... Wheat, whole wheat, most grains even some oats fall under this.

So now I basically only can have Spelt or other Old world grains but it made a huge difference. I also started drinking Vega natural shakes (berry Flavor) 1-2 times a day instead of a breakfast sandwich or something like that. Lost 15lbs in two months and feel way better, healthier and more regular.