Low Ferritin and Iron Deficiency: When IV Iron Helps

Iron deficiency is one of the most common nutritional problems in Canada, and one of the most overlooked. Many people live with it for months or years, putting their tiredness down to work, children, training or simply getting older. A simple blood test can tell you whether low iron is part of the picture, and when it is, there are several effective ways to treat it. This guide explains what ferritin is, the signs that your iron may be low, how deficiency is confirmed, and when an IV iron infusion is a better option than tablets.

What ferritin tells you about your iron

Iron does several jobs in the body, but its main role is helping red blood cells carry oxygen. Your body stores spare iron mainly as a protein called ferritin. When you have your blood tested, the ferritin level is the most useful single marker of how much iron you have in reserve.

Iron deficiency versus iron deficiency anemia

These two terms are often used as if they mean the same thing, but they describe different stages. Iron deficiency means your stores are running low, shown by a low ferritin result. Iron deficiency anemia is the later stage, when stores are so depleted that your body can no longer make enough healthy red blood cells, and your hemoglobin falls below the normal range.

Many people sit in the first stage for a long time. Their hemoglobin looks normal, so they may be told their blood work is fine, yet their ferritin is low and they feel unwell. Treating iron deficiency before it becomes anemia is entirely reasonable, and it is one of the most common reasons people come to see a Nurse Practitioner about fatigue.

Why the “normal range” can be misleading

Laboratory reference ranges for ferritin are wide, and the lower limit printed on a report can be lower than the level many clinicians use to diagnose deficiency. In adults, a ferritin below about 30 µg/L is widely used as a sign of low iron stores. Ferritin also rises with inflammation and infection, so a result in the normal range does not always rule out deficiency. This is why your result should be read alongside your symptoms and the rest of your blood work, not on its own.

Signs your iron may be low

Symptoms of iron deficiency tend to creep up slowly, which is part of the reason they are missed. Common signs include:

• Tiredness that does not improve with rest
• Shortness of breath or a racing heart with everyday activity such as climbing stairs
• Pale skin or pale inner eyelids
• Hair shedding or brittle nails
• Headaches, dizziness or poor concentration
• Restless legs, especially at night
• Feeling cold more easily than people around you
• Cravings for ice or non-food items, known as pica
• Reduced exercise performance or slower recovery from training

None of these symptoms is specific to iron deficiency. Thyroid problems, vitamin B12 deficiency, sleep apnea, depression and many other conditions can cause similar feelings. That is the reason testing comes before treatment.

Who is most likely to run low on iron

Iron deficiency can happen to anyone, but some groups are at higher risk:

• People with heavy menstrual periods. Heavy bleeding is one of the most common causes of iron deficiency in women of reproductive age.
• Pregnant people and new parents. Iron needs rise sharply in pregnancy, and stores can stay low after delivery.
• Vegetarians and vegans. Iron from plant foods is absorbed less efficiently than iron from meat, fish and poultry.
• Regular blood donors. Each donation removes a meaningful amount of iron.
• Endurance athletes. Training increases iron losses and demand, particularly in runners.
• People with digestive conditions. Celiac disease, inflammatory bowel disease and some weight-loss surgeries reduce iron absorption.
• People taking certain medications. Long-term use of acid-reducing medications can affect absorption.

In men and in people after menopause, iron deficiency always deserves a search for the cause, because ongoing blood loss from the digestive tract needs to be ruled out. Your clinician will talk with you about whether further investigation is needed.

How iron deficiency is diagnosed

Diagnosis starts with a conversation about your symptoms, diet, periods, medications and medical history, followed by blood work. A typical iron workup includes:

• Ferritin, to measure your iron stores
• Complete blood count, to check your hemoglobin and the size of your red blood cells
• Other markers, such as transferrin saturation, vitamin B12 or thyroid function, depending on your history

At AuraWell, our Nurse Practitioners can assess your symptoms, order the right tests and review the results with you. If your iron is low, the next conversation is about why, and about the right way to replace it.

Treatment options for low iron

There are three broad ways to raise iron levels. Most people start with the first, and IV iron is considered when it is not working or not suitable.

Diet

Iron-rich foods include red meat, poultry, fish, lentils, beans, tofu, fortified cereals and dark leafy greens. Eating vitamin C alongside plant sources of iron improves absorption, while tea and coffee with meals reduce it. Diet is important for keeping stores up, but on its own it is usually too slow to correct a significant deficiency.

Oral iron supplements

Iron tablets are inexpensive and work well for many people. Research suggests that taking iron once a day, or every other day, may be absorbed as well as or better than taking it several times a day, and may be easier to tolerate. The main drawback is side effects such as nausea, constipation and stomach cramps, which lead many people to stop. Oral iron also takes time: it can be several months before stores are fully replenished.

IV iron infusion

An iron infusion delivers iron directly into a vein, bypassing the digestive system. Modern IV iron preparations can replace a large dose in one or two visits. It is a prescription treatment and is used when there is a clear medical reason, not as a general wellness drip.

When an IV iron infusion makes sense

Your clinician may recommend IV iron if:

• You have tried oral iron and could not tolerate the side effects
• Your ferritin has not improved despite taking tablets correctly
• You have a condition that affects absorption, such as celiac disease or inflammatory bowel disease
• Your deficiency is significant and your symptoms are affecting daily life
• You are in later pregnancy or recovering after delivery, where your care team feels IV iron is appropriate
• You have ongoing blood loss that tablets cannot keep up with

IV iron is not right for everyone. It is not used when iron levels are normal or high, in certain infections, or in people with a history of serious reactions to IV iron. Your Nurse Practitioner reviews these points with you before anything is prescribed.

What an iron infusion visit at AuraWell looks like

Our iron infusion service is part of our NP-led clinic in Woodbridge, Vaughan, and every step is clinician-directed.

1. Assessment and diagnosis

Your visit begins with a Nurse Practitioner assessment. Your symptoms, history and blood work are reviewed, the cause of your deficiency is discussed, and your iron dose is calculated from your results and body weight.

2. Your prescription

If IV iron is appropriate, your Nurse Practitioner prescribes the iron medication. You fill it at your pharmacy and bring it to your infusion appointment. Many private drug plans cover IV iron medications, so check with your plan before your visit.

3. The infusion

A nurse places a small IV in your arm and the iron is given slowly in our infusion lounge while you relax. Depending on the product and dose, the infusion itself usually takes from fifteen minutes to about an hour. You are monitored throughout, and you rest for a short time afterwards before heading home. Most people can drive themselves and return to normal activities.

4. Follow-up testing

Ferritin and hemoglobin are rechecked after the infusion, usually several weeks later, to confirm your stores have recovered and to plan any further treatment. Finding and addressing the cause of the deficiency is part of the plan, so your iron does not drop again.

Side effects and safety

Modern IV iron preparations are well tolerated by most people. Common, short-lived effects include a metallic taste, headache, mild aches or flushing. Serious allergic reactions are rare, which is why infusions are given in a clinical setting with trained staff and monitoring. Occasionally iron can leak around the IV site and cause a brown mark on the skin, so nurses watch the site carefully during the infusion. Tell your clinician if you are pregnant, have had a reaction to iron before, or have asthma, allergies or liver problems.

What IV iron costs in Ontario

At AuraWell, the Nurse Practitioner assessment, diagnosis and treatment plan is $300, and the administration fee for the infusion is $200. The iron medication is separate and is filled at your pharmacy, where it is often covered by private drug plans. Some extended health benefits may also reimburse part of the clinic fees. For a full breakdown of costs and coverage, read our iron infusion cost guide for Ontario.

IV iron is not the same as a vitamin drip

People sometimes book an IV vitamin drip hoping it will fix exhaustion that is really caused by low iron. Wellness drips such as hydration or Myers’-type formulas contain fluids, vitamins and minerals, but they do not contain therapeutic iron and they do not treat iron deficiency. If you are tired most of the time, testing your iron first is often the more useful step. You can learn about the difference on our IV therapy page.

Frequently asked questions

What ferritin level is considered low?

In adults, a ferritin below about 30 µg/L is commonly used as a sign of low iron stores, even if the lab report shows it within the reference range. Your clinician interprets your result alongside your symptoms and other blood work.

Can I have low iron if my hemoglobin is normal?

Yes. Iron deficiency without anemia is common. Your stores can be low for a long time before your hemoglobin falls, and many people have symptoms during this stage.

How many iron infusions will I need?

Many people need one or two infusions, depending on the product used and how low their iron is. Your Nurse Practitioner calculates the dose from your blood work and body weight.

Do I need a referral for an iron infusion at AuraWell?

No referral is needed. You start with a Nurse Practitioner assessment, and if you have recent blood work, bring a copy to your visit.

Will I feel better right after the infusion?

Everyone responds differently. Your body needs time to use the new iron to make red blood cells and rebuild its stores, which is why follow-up blood work is part of your plan.

Think your iron may be low? Book a visit at AuraWell Health, 4600 Hwy 7, Unit 105, Woodbridge, by calling 905-207-7000. Our Nurse Practitioners can test your levels, explain your results and talk you through every treatment option, from diet and tablets to an iron infusion.

Keep reading: heavy periods and low iron, restless legs and low iron and what to eat after an iron infusion, with nutrition support from our naturopathic doctor.