On a starch based diet we don't have to target an 11 % ratio for it's the guaranteed result of eating plant food instead of meat and dairy. (nutritionfacts.org)
Remember that if you don't eat meat or fish, you can boost absorption by including a source of vitamin C when eating plant sources of iron. (healthline.com)
You will be much better off by eating a plant based diet and avoiding any supplements that contain iron. (nutritionfacts.org)