What the ThreeLac distributor told you is correct. It's related to the die-off. Symptoms will usually last 5-10 days, and if you can bear with it, they will go away and do not tend to reoccur. This is a good sign that the ThreeLac is working. However, you do need to be aware that if they don't subside, or if they reoccur, you may have a sensitivity to the ThreeLac, and may want to discontinue use, but if you can, hang in there, once this passes you should see good results from the ThreeLac.