I'm a physician myself, a psychiatrist. I just had what looked at first blush like blood in stool, not voluminous quantities, bits...Last night I ate red cabbage, and I also had some herbal tea called dragonfly devotion, which is red. I'm due for a colonoscopy (is it every five years now?) so I'll schedule it for the next few weeks. I also have both internal and external hemorrhoids. Question is, can red cabbage, red tea turn your stool red? It's not the reddest red. Thanks.