My understanding is that the 100-150 that shows when you are tracking iron is 100%-150% of the DV of 18mg. This is based on the fact that nutrition labels are required to show the % RDA of iron content based on the 18mg. Since that's what the labels are required as, I don't believe that Spark changes that baseline for men, or for women over 50.
Now, the other issue that may come in to play here is dependent on what items you are entering in to your tracker. If it's a Spark item, based on the USDA nutrient lists, then the % of iron will be included. If it's an item that you entered yourself based on the package label, and you entered the % iron as shown on that label, then it's included. However, there are many other user-entered items that do not include info on the % of iron. A lot of user-entered items contain calories only, or just calories/carbs/fat/protein, or some other combination of incomplete information. If you used an item like this, then I could see the numbers coming out off like yours have. You might want to double-check the items you used to see if this is the problem.
If you want to base your tracking on the 8mg, then you'd want to change the "ok" range from 100-150 down to 44-67. Personally, I leave mine where it is, as I need to intake more than the recommended 8mg in order to maintain my iron levels, but you should discuss that with your doctor.
Hope this helps!
Start weight: 240 lbs
Goal weight: 155 lbs (reached March 7, 2014)
Afraid of a colonoscopy? Believe me - they are much less frightening than surgery and chemotherapy.
Colonoscopies allow polyps to be removed before they can become cancer, or let cancers be found before they are too widespread. If you are 50 or older, or have any symptoms, please don't let fear stop you from covering your butt.
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