It is just like blood meal, isn't it? So it must be good for the plants.
There are theories out there, that if we would live in a clean enviroment and eat just clean raw food, women would not have bleeding during their monthly cycle just like wild animals don't. They say, that bleeding from anywhere any time is not something our bodies naturally do. When our bodies become toxic to certain amount, hormones during the cycle weaken blood vessels, and that's why bleeding occurs, otherwise there would be just some mucus lining shedding, no blood. I thought, it was interesting, even if not about composting.