Gross Warning... Question about Iron tablets...?

Recently I started taking Iron, 65 mg of Iron, 325 mg Ferrous Sulfate because I read that Iron deficentcy cause dark circles under the eyes which I have. I have noticed that my feces are a dark greenish black since I started taking the tablets and I was wondering if this a normal reaction and if so, what causes... show more Recently I started taking Iron, 65 mg of Iron, 325 mg Ferrous Sulfate because I read that Iron deficentcy cause dark circles under the eyes which I have. I have noticed that my feces are a dark greenish black since I started taking the tablets and I was wondering if this a normal reaction and if so, what causes it. Thanks for any info.
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