You’ve Been Told You Have Low Ferritin or Iron-Deficiency Anemia. Now What?

Written By eMpowered Wellness

So your bloodwork came back and you were told you have low ferritin, iron deficiency, or iron-deficiency anemia.

Now what?

First, let’s clarify the difference.

Low ferritin means your stored iron is low. Ferritin is like your iron savings account.

Iron-deficiency anemia means your iron levels are low enough that your body is struggling to make healthy red blood cells and transport oxygen properly.

You can have low ferritin before you become anemic — and you can still feel awful.

Low iron can affect energy, mood, exercise tolerance, recovery, heart rate, endurance, brain fog, and your ability to move through your day. This matters because your metabolism is not just your resting metabolic rate. Your total daily energy burn also includes your workouts and all the movement you do outside the gym — walking, cleaning, errands, stairs, fidgeting, standing, and daily life. This is called NEAT, and it is negatively impacted by low ferritin/iron deficiency anemia, which can make weight loss more challenging.

When iron is low, you may naturally move less because everything feels harder.

Step 1: Ask Why Your Iron Is Low

The first step is not just “take iron.”

The first step is asking: why is it low?

Common reasons include:

  • heavy menstrual bleeding

  • low iron intake

  • low overall calorie intake

  • vegetarian or vegan diets without enough iron planning

  • poor digestion or absorption

  • celiac disease or inflammatory bowel disease

  • frequent blood donation

  • pregnancy or postpartum

  • endurance training or high training volume

  • gastrointestinal blood loss

  • low B12 or folate contributing to anemia

  • medications that affect stomach acid or absorption

You do not just want to fill the bucket.
You need to know why the bucket is leaking.

Step 2: Make Sure the Right Labs Were Checked

A full picture usually includes more than hemoglobin.

Helpful labs may include:

  • CBC

  • hemoglobin

  • hematocrit

  • MCV

  • ferritin

  • serum iron

  • transferrin saturation

  • TIBC

  • CRP or inflammation marker

  • B12

  • folate

This matters because ferritin can be affected by inflammation, and not all anemia is caused by iron deficiency.

If you have heavy periods, digestive symptoms, very low ferritin, persistent fatigue, or you are not responding to iron supplements, it is worth following up with your healthcare provider.

Step 3: Build Iron-Rich Meals

There are two types of iron in food.

Heme iron is found in animal foods and is generally absorbed better.

Good sources include:

  • beef

  • bison

  • lamb

  • poultry

  • fish

  • seafood

  • eggs

  • liver, if tolerated and appropriate

Non-heme iron is found in plant foods and fortified foods.

Good sources include:

  • lentils

  • beans

  • tofu

  • tempeh

  • pumpkin seeds

  • spinach

  • oats

  • quinoa

  • fortified cereals

  • dried fruit

You do not need to eat red meat if you do not want to, but if your iron is low, you do need a plan.

Step 4: Pair Iron With Vitamin C

Vitamin C helps improve absorption of non-heme iron.

Easy pairings:

  • eggs with berries

  • steak with peppers

  • lentils with tomatoes

  • tofu with broccoli

  • spinach with strawberries

  • beans with salsa

  • fortified cereal with berries

  • pumpkin seeds with citrus fruit

  • chili with tomato sauce and bell peppers

This is one of the simplest nutrition upgrades you can make.

Step 5: Watch What You Take Iron With

Some foods and supplements can reduce iron absorption when eaten at the same time.

Try to avoid taking iron supplements with:

  • coffee

  • tea

  • calcium supplements

  • high-calcium dairy

  • antacids

You do not need to avoid these forever. Just separate them from your iron supplement or highest-iron meals when possible.

A simple example:

Take iron with vitamin C earlier in the day, then have coffee or calcium later.

Step 6: Consider Digestion

If you are taking iron but your ferritin is not improving, digestion and absorption matter.

Things worth exploring with your provider may include:

  • reflux or frequent antacid use

  • chronic bloating

  • diarrhea or constipation

  • celiac disease

  • inflammatory bowel disease

  • H. pylori

  • history of bariatric surgery

  • low appetite or low food intake

  • gut inflammation

If you cannot absorb the iron, simply taking more may not solve the problem.

Step 7: Choose the Right Iron Supplement Strategy

Iron supplements can help, but they can also cause side effects.

Common side effects include:

  • constipation

  • nausea

  • stomach pain

  • reflux

  • diarrhea

  • dark stools

Some people tolerate certain forms better than others. Common forms include ferrous sulfate, ferrous gluconate, ferrous fumarate, iron bisglycinate, and polysaccharide iron.

More is not always better. High-dose iron can be hard on the gut, and taking iron without knowing your labs is not ideal, because too much iron can be dangerous!

Your dose, form, and schedule should be based on your bloodwork, symptoms, tolerance, and provider guidance.

Step 8: Do Not Ignore Your Menstrual Cycle

If you have heavy periods, this needs to be part of the conversation.

If you keep losing more iron every month than you can replace, supplements may only temporarily patch the problem.

Heavy periods are common, but that does not mean they should be ignored and should be investigated by your health care provider.

Step 9: Use Cast Iron Cooking as a Bonus

Cooking with cast iron can increase the iron content of food, especially acidic foods like tomato sauce or chili.

Is it enough to fix significant iron deficiency?

Usually no.

But it can be a helpful bonus strategy alongside food, supplements, and medical follow-up.

Step 10: Know When Iron Infusions May Be Needed

Iron infusions may be considered when:

  • ferritin is very low

  • anemia is significant

  • oral iron is not tolerated

  • oral iron is not working

  • absorption is poor

  • there is ongoing blood loss

  • iron needs to be corrected more quickly

  • there are medical conditions affecting absorption

Iron infusions are not a wellness trend. They are a medical treatment and should be ordered and monitored appropriately.

The Bottom Line

If you have low ferritin or iron-deficiency anemia, the goal is not just to “take iron.”

The goal is to understand:

Why is it low?
Are you losing iron?
Are you eating enough iron?
Are you absorbing it?
Are B12 or folate involved?
Are heavy periods part of the issue?
Is digestion part of the issue?
Do you need food changes, supplements, or medical treatment?

Low iron can impact your energy, your workouts, your daily movement, and how your body feels.

So if you have been feeling exhausted, dragging through workouts, skipping walks, craving rest, feeling breathless, or wondering why everything feels harder — it might not be a discipline problem.

It might be a deficiency problem.

And it is worth investigating properly.

  • National Institutes of Health, Office of Dietary Supplements. Iron — Fact Sheet for Health Professionals.

  • British Society of Gastroenterology. Guidelines for the Management of Iron Deficiency Anaemia in Adults. Gut. 2021.

  • American College of Obstetricians and Gynecologists. Screening and Management of Bleeding Disorders in Adolescents With Heavy Menstrual Bleeding. 2019.

  • Houston BL, Hurrie D, Graham J, et al. Efficacy of iron supplementation on fatigue and physical capacity in non-anaemic iron-deficient adults. BMJ Open. 2018.

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