Interesting find I have systemic whipple's disease that's causing me secondary porphyria I've noticed on a different thread on another website that people who have it were talking frequent doses of turmeric which was exacerbating the disease for them I don't think they put two and two together that turmeric curcumin has sulfur in it which is what gives it that yellowish color. Sulfur or sulfonamides make porphyria symptoms worse. Just thought I'd share and help someone. I tried leaving a comment on the other website but it wouldn't let me do it.