Hey! I have the same issue and brought it up with Julian (the founder dude) a few months ago. Apparently the iron is from the oats and the rice protein, so it isn’t going to change. https://discourse.huel.com/t/how-can-we-improve-huel-both-product-and-service/2716/10?u=huell.babineaux
My iron was too high in late July. Since then I’ve given blood every 8 weeks (red blood cells are made of hemoglobin, which is made from ferritin, which is made from iron) in an attempt to get my iron down. My hemoglobin was a little lower the last time I gave blood, but I don’t plan on having my iron tested until about a month from now.
I’ve looked, and I don’t know of any alternatives to Huel that are as healthy and low GI as Huel, so I’m fine just giving blood instead of changing my diet. Maybe you can ask your doctor about donating blood instead of changing your diet?