In reading the latest posts, in this thread, I have to say that the hair splitting on animal ingredients in this or that, is precisely what I referenced in my original post, here: If I had to plan every move I made in my life to make sure I wasn't in violation of some "Vegan Manifesto," I strongly doubt that I would have been as successful as I've been over these past, many decades, in my dietary choices.
Yes, glycerine comes from animals, as does leather. Ditto, some medicine ingredients. I don't worry about that. Rather, I eat no animal products, about 99.9% of the time. Occasionally, at a party, I will have a slice of cake that contains eggs. I don't care.
I view my dietary choices as better for me, better for other species, better for the planet. That's it, that's all I need. I'm happy.