Thanks for writing in about your ferritin problem. Your right to be taking action as 14 is quite low. In my experience anything under 30 and the athlete will suffer severe performance degradation and fatigue. Under 50 is where we begin to see the first symptoms of fatigue and poor recovery with some performance drop off.
I’ve had a fair bit of experience coaching young women and many have had low ferritin. Ferritin is slow to respond to iron supplementation. Finding the right iron supplement and dose can take time. Iron is normally bound to another element(s) and ferris sulfate is the most common to find in drug stores. It’s the cheapest and, from my experience the least bio-available and the hardest on your gut. It causes constipation in everyone I know of who’ve used it. Ferris Gluconate on the other hand seems to be much easier on the gut and more bio-available. It is harder to find though. Shopping on line will make the process easier.
Heme iron, the iron that is the hemoglobin protein in animal muscle is the most absorbable/bio-available type of iron supplement. This is where the old axiom of eating red meat to cure anemia comes from. IT WORKS.
Heme-iron supplements are available and I think they work the best of anything I’ve seen used other than chelated iron which is also more easily absorbed.
As for dosage: Normal it is recommend to take more until you get adverse reactions like constipation or upset stomach. Here’s the rub: Having too much iron floating around in your blood (not bound to ferritin) can be a bad thing. Iron toxicity is dangerous and ironically the symptoms of iron toxicity are the same as those found when you have low iron, low ferritin levels. That is; fatigue, low energy and lowered work capacity. I always suggest that athletes get a full iron panel done along with their ferritin tests. I’ve usually seen the use of 15-20mg/day of elemental iron. Read the label to see how much elemental iron is in the supplement
Low ferritin with high iron levels indicates that your body is not making more ferritin in response to the increase in iron. I suggest monitoring all these levels throughout your recovery. Continued dosing with iron supplements, in this case, can lead to iron toxicity. There can be other underlying medical contributing factors that need more workup.
I’ve never personally used IV iron but have heard of some athletes who did use it and got very quick results in returning to health. Obviously you will need to consult your doc about this.
I hope this info helps. Good luck.