You know I am new on this regime so have notice my kidneys hurt when I eat alot, you know they are so delicious. Most people have problems with flax seed because they dont grind them enough or let them go rancid, sitting for over 10 minutes. The secret is to put them in yougurt and then when you eat them the reaction is less, but you know your body and what is best. for me they are the best part of my diet and I eat them 3 times a day, maybe that is why my symptons are so light.