i don't think there could be harm from eating activia, but that's just me. i used to take a potent probiotic pill every day. i just haven't restocked lately. if you feel better, that's great!
READ ME key info on nutrient targets - www.thisisms.com/ftopict-2489.html
my approach: no meds so far - just nutrient-dense anti-inflammatory whole foods, and supplements where needed
info: www.whfoods.com, www.nutritiondata.com