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Iron supplements do not cause weight gain. If you are experiencing weight gain it would be from any number of reasons. People with anemia or low iron don't feel they have energy to do exercise or even their regular daily housework type of work so they slow their pace, stop exercising and do a lot more sleeping. This could lead to weight either staying stable or "maybe" putting on a little weight, but definitely not a BIG contributor to weight gain, unless it went on for years and years of inactivity while still eating a lot.

If you are suddenly gaining weight it could be due to hormonal imbalance, low thyroid, insulan resistance, slow metabolism, wrong food choices in your diet, inactivity, malabsorption of nutrients due to poor digestion can lead to your body storing fat, parasites and yeast overgrowth are also another 2 common causes of weight gain in some people. Adrenal issues eg: cortisol and DHEA-S imbalance can lead to weight gain (waist area). Estrogen and progesterone imbalance will lead to weight gain too, predominantly the hip area.

Don't forget, constant or long term stress will affect your digestive system and you wont absorb nutrients as readily as when your life is calm. Sometimes you think you are coping well with stress, but subconsiously you are not. This is also my case i believe as i went through some major stress for some years in my pesonal life. Later i felt i was more in control and calm, but i wasn't aware how people get 'used' to living with stress and feel they are in control, but deep down stress is still affecting them and their digestion.

As you can see, most of the weight gain issues are either digestive or hormonal. You might want to find out why you are low in iron eg: loss of blood or digestive issues. Once you correct the issue then you should be much better off. I spent far too much time looking at only ferritin, when i should have been expanding my research and finding out what was causing my ferritin to start dropping in the first place.

Hope you feel well soon :)
I usually post on the thyroid board but came here because I was recently put on b 12/iron supplements due to low normal ferritin levels. Nothing has changed in my diet or activity level and I've gained weight. I follow a pretty restricted diet because I'm hypoglycemic. I'm wracking my brain trying to figure out why the gain since I'm not doing anything different and then I remembered I started a new med.

Could it be possible that some people DO gain weight with iron supplements? I honestly can't attribute it to anything else. I may stop them for a few weeks to see if I lose some weight. This is very clothes are so tight!!!!
juner50--Welcome to the Anemia board! :wave:

I am a firm believer that anything can happen to anyone, as we are all individuals, and something that may effect one person may not another.

I have never heard/read anything here regarding weight gain and iron supplementation, besides this post from my own personal experience.

I would say that [B]IF[/B] you are having a thyroid problem/activity then I would say that it is most likely related to that. But know that it could always be iron supplements for you. It also could be one of the "inactive ingredients" in the supplement. FLFG :)
I agree with FLFLOWERGIRL, it would either be thyroid related and i also know that hormonal imbalances can cause weight gain eg: excess estrogen, progesterone deficiency. Estrogen is always in excess when progesterone is low and this causes a host of symptoms of which a low thyroid is one of them.

I still highly doubt it's your iron supplements as all it does is build up your iron reserves which your body needs.
Thanks for your responses. It may not be the iron/B 12 per may be a reaction or interference with the thyroid and iron. Also I've been on BHRT estrogen & progesterone for years and was doing well but I wonder if the addition of the iron supp is somehow causing a problem?

I take my thyroid and Estr in the AM and Iron, Estr and progesterone in the PM. The progest I only take two weeks out of every month. I wonder if the iron is effecting my BHRT ? I've noticed a lot of bloating, especially in my lower abdomen. No constipation but my tummy is huge and my fingers and feet are swollen.

Like I said, I'm going to stop the iron for a few weeks to see if I notice a difference.
juner50 - if you have been on the BHRT for years, does anybody recheck you to see whether you are on the correct amount for your present hormone levels? Things can change over the years and they ought to be monitoring you.

I've been on various iron supplements for over 3 years now, i have Hashimoto's and excess estrogen. I've never had bloating from iron. The only thing some brands of iron gave me were either constipation or IBS, but not the one i'm on now, it's good. How long have you been using the iron supplement?

The type of bloating you describe sounds like major water retention and that would be hormonal. The only other thing would be being allergic to a certain ingredient in any of the things you are taking. Iron supplements don't cause water retention though and a healthy ferritin level is very good for the thyroid. Long term low ferritin will make a thyroid condition worse.

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