Wait, wait, wait...
If such disposed of blood has such charge, how high must be charge of blood right from the veins?
You know? I dont know. I never considered it lol. If I had to guess, I would think menstrual blood might even be more powerful because it is so layered, but then it would lack the pure life energy of a tapped vein? Interesting.
We are getting into dangerous territory though. My advice - no blood. It is just not necessary and there are so many other elements you can use to do the same job. A lot of people use blood because their technique is weak or misaligned, and they are overcompensating for this with an excessive power ingredient.
i made a short post on menstrual blood in my journal if anyone is interested.