I'm a big seaweed lover, so I thought carrageenan was just another way to get seaweed. However, I'm hearing more and more about how this food additive (I think there's tons in McDonald's milkshakes) may cause gastro and BRAIN inflammation. I think I'd rather be safe than sorry. Also, it's in INFANT formula, although in Europe they don't allow it. That tells you something.
My sadness is that the nut and soy milks I make are so watery, while the commercial stuff is so nice...because of carrageenan.
Supposedly carrageenan is about as natural a seaweed extract as high fructose corn syrup is to corn; i.e., they use terrible alkali and so forth to get it out. I'm getting rid of all my carrageenen products right now.
Read more here: http://articles.chicagotribune.com/2013-03-18/health/ct-met-carrageenan-0318-20130318_1_carrageenan-fda-scientists-food-additive-safety
and here: http://www.notmilk.com/carageenan.html