I purchased a liquid iron that has 40 mg of elemental iron. I tried the 325 pills, which contain, I think 65 mg elemental iron, but was unable to tolerate them, esp stomach irritation and constipation!!!
The liquid seems better for me. I usually take it with meals, since on an empty stomach it is too bothersome. It is recommended that empty stomach is best for absorption, but I can't tolerate it.
85 is pretty high for raising one's ferritin when it is not clinically in a deficiency state. I would say it is quite sufficient. Just remember, it takes time to raise ferritin.
I took the iron for a month, then rechecked my ferritin. It rose from 18 to 20!. Boy do I have a long way to get to 70.
I am doing this without dr's approval - ran into the "you are in range" a million times. So, I am a little cautious about the whole matter.
Why not just run it by your dr? and let him know what product and amount of iron you have selected.