Anybody know a brand of psyllium husk that doesn’t turn purple?!

[Aberforthsgoat]

Have been making keto bread and bagels but the PH always turns it purple! Apparently there are brands out there that don’t do it but I can’t seem to find any - does anyone use any they can recommend and if so where do you get from?

I know it's a bit late but Grape Tree psyllium doesn't turn purple.