Markus, it is about best effort. Just because bacteria dies does not mean we must seek out to kill humans, bugs or other animals.

It is an individual decision. I find people are very understanding of my views and are not offended that I will not eat animals at their house. I see nothing wrong with keeping to this value for life whether at home or as a guest. I merely eat around what is available or have a beverage and eat later. I often keep a snack of a raw food bar or something in my car or purse. I imagine it is similar for a jewish person who does not eat pork and when they may decline it will not hurt feelings.

I use a vegetarian DHA Omega 3 and find it is great, called Omega Zen