I'm trying to take more iron, for various reasons, and have hit a problem. I'm taking 20mg iron in bisglycinate form, and if I take one capsule, I think I'm OK, but that's not really enough to deal with this sort of problem. Two capsules causes the most appalling flatulence, at a level which isn't acceptable. This is meant to be one of the better forms of iron! Is there any way of getting my iron levels up that won't do this? I'm vegan (eating plenty of leafy greens already) and in the UK, although I don't mind ordering something from iHerb or similar as long as it doesn't come to more than £15 (customs charges hit above that). What should I be looking at? Ferrous gluconate? A liquid form?

Also, should I be taking extra vitamin C, even though I get plenty of fresh fruit and veg already? I had my eye on a buffered 500mg one from Bio-Health. Will that make a difference to the iron levels I end up with?