I recently saw an endocrinologist for hair loss, fatigue, cold intolerance and brittle nails. I also have PN. She found my thyroid and hormone levels normal but ferritin was 16(normal range is 10-160). I questioned the nurse about this number. She said it's within the normal range. I had been researching low ferritin and found the level should be at least 70 to prevent and eventually regrow hair. She said it wouldn't hurt to take iron supplements. She wants me to then have my GP follow up and retest. My hemoglobin and hematocrit were within normal range. I'm 50 years old and still menstruate regularly.

I found ferrous Fumarate 325 mg that contains 106 mg elemental iron. Is there a better supplement that others have tried and is 1 pill per day enough to increase my ferritin levels?