Folic acid deficiency anemia is a common blood condition that develops when your body lacks enough folic acid — a vital B vitamin — to produce healthy red blood cells. Without adequate red blood cells, your organs and tissues cannot get the oxygen they need, leading to fatigue, weakness, and other health problems that affect thousands of Canadians every year.
What Is Folic Acid Deficiency Anemia and Who Is at Risk?
This type of anemia is particularly important for women who are pregnant or planning a pregnancy, as low folate levels are linked to serious birth defects such as neural tube defects. Whether you are experiencing folate deficiency symptoms or simply want to understand your risk, this guide covers the causes, diagnosis, and treatment options available in Canada so you can make informed decisions about your health.
Symptoms of Folic Acid Deficiency Anemia
How Folic Acid Deficiency Anemia Is Diagnosed
Treatment for Folic Acid Deficiency Anemia
Recommended Daily Folic Acid Intake
Folic Acid Deficiency and Pregnancy in Canada When to See a Doctor Frequently Asked Questions
Can folic acid deficiency anemia be confused with vitamin B12 deficiency?
Is folic acid deficiency anemia covered by provincial health plans in Canada?
What Is Folic Acid Deficiency Anemia?
Treatment Options for Folic Acid Deficiency Anemia
Treatment Option Benefits Considerations
Oral Folic Acid Supplements (0.4–5 mg/day) First-line treatment; highly effective at restoring folate levels within weeks; widely available over the counter in Canada Dose depends on severity and underlying cause; masking B12 deficiency is a concern — B12 levels should be tested before starting
Dietary Modifications Supports long-term folate intake through natural food sources such as leafy greens, legumes, and fortified grains May not be sufficient alone in cases of severe deficiency or malabsorption; requires consistent dietary adherence
Treatment of Underlying Cause Addresses root causes such as alcohol use disorder, celiac disease, or medication interactions to prevent recurrence May require specialist referral; timeline for improvement varies depending on the underlying condition
Intravenous (IV) or Intramuscular Folate Used when oral supplementation is not tolerated or absorption is severely impaired; delivers folate directly into the bloodstream Less commonly required; typically administered in a hospital or clinical setting in Canada
Prenatal Folic Acid Supplementation (0.4–1 mg/day) Prevents folic acid deficiency anemia during pregnancy; reduces risk of neural tube defects; recommended by Health Canada Should begin at least three months before conception; higher doses (up to 5 mg) recommended for high-risk pregnancies
Folic acid (also called folate) is a B vitamin your body needs to make red blood cells. Your body cannot produce folic acid on its own, so you must get it from food or supplements. Good sources include citrus fruits, dark leafy greens, and fortified cereals.
Your body can store enough folic acid to last two to six months. However, anemia can develop within just a few weeks once those stores run low. Health Canada recommends daily folate intake to prevent deficiency and support overall health.
Folic acid deficiency anemia is different from other types of anemia. For example, iron-deficiency anemia involves a lack of iron, while this condition involves a lack of folate. It is important to get the right diagnosis because the treatments are different.
Common Causes of Folic Acid Deficiency Anemia
There are several reasons why someone may not have enough folic acid. Understanding the cause helps your doctor choose the best treatment.
Poor Diet
Not eating enough folate-rich foods is one of the most common causes. Many Canadians do not eat enough fresh vegetables and fruits each day. A diet high in processed foods can make the problem worse.
Increased Need for Folate
Certain situations increase your body’s demand for folic acid. Pregnancy is the most well-known example — a growing baby needs a great deal of folate. Conditions like sickle cell disease also raise your body’s folate needs significantly.
Malabsorption
Some people cannot absorb folate properly, even if they eat enough of it. People who drink alcohol heavily or those with severe kidney disease requiring dialysis are at higher risk. Certain digestive conditions can also interfere with folate absorption.
Medications
Some prescription medications can interfere with how your body uses folic acid. These include certain drugs used to treat cancer, rheumatoid arthritis, and seizure disorders. Always tell your doctor about every medication you take, including over-the-counter drugs and supplements.
Symptoms of Folic Acid Deficiency Anemia
Mild cases of folic acid deficiency anemia may cause no symptoms at all. As the condition gets worse, symptoms begin to appear. Catching them early makes treatment easier and more effective.
Common Symptoms
Fatigue and weakness — feeling tired even after rest
Dizziness — feeling lightheaded, especially when standing up
Pale skin — a noticeable change in skin colour
Irritability — feeling moody or easily frustrated
Difficulty concentrating — trouble focusing at work or school
Poor appetite — not feeling hungry or losing weight
Memory problems — forgetting things more often than usual
Less Common Symptoms
In some cases, people also experience digestive issues like diarrhoea or stomach pain. Others notice a sore tongue or dry, cracked lips, especially at the corners of the mouth. More serious symptoms can include shortness of breath, a fast or irregular heartbeat, or chest pain.
If you notice any of these symptoms, do not ignore them. They can point to other health problems as well. Therefore, getting a proper medical evaluation is always the right move.
How Folic Acid Deficiency Anemia Is Diagnosed
Your doctor will start by asking about your health history, eating habits, medications, and alcohol use. A physical exam will follow. This gives your doctor a full picture of what may be causing your symptoms.
Blood Tests
Your doctor will likely order a complete blood count (CBC). This test looks at the number, size, shape, and colour of your blood cells. If your red blood cells are larger than normal — a condition called macrocytosis — folate deficiency is often the cause.
Your doctor will also measure your folate and vitamin B12 levels. This step is very important. Both deficiencies can cause similar symptoms, but they require different treatments. The Mayo Clinic explains how different types of anemia are diagnosed and why getting the right test matters.
Treatment for Folic Acid Deficiency Anemia
The good news is that folic acid deficiency anemia is very treatable. Most people feel better within days of starting the right treatment. Your doctor will guide you based on the cause and severity of your deficiency.
Folic Acid Supplements
Taking 1 mg of folic acid daily by mouth is the standard treatment. Most people see improvement within five to seven days. Your doctor will usually recommend continuing supplements for one week to two months, until your folate levels return to normal.
Some people with chronic conditions — such as haemolytic anemia, hyperthyroidism, or liver disease — may need to take folic acid supplements for the rest of their lives. Your doctor will monitor your levels and adjust the plan as needed.
An Important Warning: Ruling Out Vitamin B12 Deficiency First
Before treating with folic acid, your doctor must confirm that the anemia is not caused by a vitamin B12 deficiency. This is critical. If you take folic acid when you actually have a B12 deficiency, you may feel better at first — but the nerve damage caused by low B12 can continue to get worse without you knowing.
Over time, untreated B12 deficiency can lead to serious and permanent neurological damage. Therefore, always get tested for both deficiencies before starting any supplements on your own.
Diet Changes
Once your anemia is treated, keeping your folate levels up through diet is the best long-term strategy. Add these folate-rich foods to your daily meals:
Citrus fruits like oranges and grapefruit
Dark leafy greens such as spinach, kale, and romaine lettuce
Fortified breakfast cereals (check the label for folate content)
Avocado
Lentils and beans
Beef liver (in moderation)
Broccoli and Brussels sprouts
Recommended Daily Folic Acid Intake
The amount of folic acid you need each day depends on your age and life stage. The following guidelines are based on Health Canada’s daily recommended folate intake.
Children
0–6 months: 0.06 mg per day
7–12 months: 0.08 mg per day
1–3 years: 0.15 mg per day
4–8 years: 0.20 mg per day
Males and Females (9 years and older)
9–13 years: 0.30 mg per day
14 years and older: 0.40 mg per day
Pregnancy and Breastfeeding
Pregnant women (any age): 0.60 mg per day
Breastfeeding women (any age): 0.50 mg per day
Getting enough folic acid before and during pregnancy is especially important. Low folate levels in early pregnancy can lead to neural tube defects — serious birth defects of the brain and spine. In Canada, many family doctors and midwives recommend a prenatal supplement containing folic acid well before conception.
Folate Content in Common Foods
¾ cup fortified cereal: approximately 0.40 mg
85 g beef liver: approximately 0.20 mg
½ cup avocado: approximately 0.10 mg
¾ cup orange juice: approximately 0.06 mg
Folic Acid Deficiency and Pregnancy in Canada
Folic acid deficiency during pregnancy is a serious concern. Low folate levels increase the risk of neural tube defects like spina bifida and anencephaly. It can also lead to low birth weight and other complications.
In Canada, most provincial health plans cover prenatal blood work, including folate testing. If you are pregnant or planning to become pregnant, speak with your family doctor or midwife about the right supplement for you. Starting folic acid supplementation at least three months before conception is widely recommended.
When to See a Doctor
You should see your family doctor or visit a walk-in clinic if you notice ongoing fatigue, dizziness, pale skin, or any of the other symptoms described above. These signs can point to several conditions, so a proper diagnosis is important. Do not try to self-diagnose or self-treat.
If you are pregnant, planning a pregnancy, or have a chronic condition that affects nutrient absorption, talk to your doctor about your folate levels sooner rather than later. In Canada, your provincial health plan generally covers the blood tests needed to check for anemia. Your family doctor or a walk-in clinic doctor can order these tests quickly and help you get started on treatment right away.
As always, consult your doctor or a qualified healthcare provider before starting any new supplement or making major changes to your diet, especially if you have an existing health condition.
Frequently Asked Questions
What are the main signs of folic acid deficiency anemia?
The most common signs of folic acid deficiency anemia include extreme tiredness, weakness, pale skin, dizziness, and difficulty concentrating. Some people also experience a sore tongue, mouth sores, or shortness of breath. If you notice these symptoms lasting more than a week or two, see your family doctor or visit a walk-in clinic.
How is folic acid deficiency anemia treated?
Treatment for folic acid deficiency anemia usually involves taking a daily folic acid supplement of 1 mg by mouth. Most people start to feel better within five to seven days. Your doctor may also recommend eating more folate-rich foods like leafy greens, citrus fruits, and fortified cereals.
What foods are highest in folic acid?
Foods rich in folic acid include dark leafy greens (spinach, kale), citrus fruits, avocado, lentils, beans, and fortified breakfast cereals. Beef liver is also very high in folate, though it should be eaten in moderation. Eating a variety of these foods daily can help prevent folic acid deficiency anemia.
Why is folic acid important during pregnancy?
Folic acid is essential during pregnancy because it supports the healthy development of the baby’s brain and spinal cord. Low folate levels can lead to neural tube defects such as spina bifida. Canadian health guidelines recommend that women start taking a folic acid supplement at least three months before they plan to become pregnant.
Can folic acid deficiency anemia be confused with vitamin B12 deficiency?
Yes — folic acid deficiency anemia and vitamin B12 deficiency anemia share many of the same symptoms, making them easy to confuse. However, treating a B12 deficiency with folic acid alone is dangerous, as it can mask nerve damage that keeps getting worse. Always get a blood test to confirm which deficiency you have before starting treatment.
Is folic acid deficiency anemia covered by provincial health plans in Canada?
According to Health Canada’s guidelines on folate intake, this information is supported by current medical research.
For more information, read our guide on learn what your CBC results mean.
In most Canadian provinces, the blood tests needed to diagnose folic acid deficiency anemia are covered under provincial health plans when ordered by a doctor. Your family doctor or walk-in clinic doctor can order a complete blood count and folate level test. Check with your provincial health authority for details about coverage in your region.
Key Takeaways
Folic acid deficiency anemia develops when your body does not have enough folate to make healthy red blood cells.
Common causes include a poor diet, pregnancy, heavy alcohol use, certain medications, and conditions that affect nutrient absorption.
Symptoms range from fatigue and dizziness to shortness of breath and a rapid heartbeat.
A blood test from your family doctor or walk-in clinic can confirm the diagnosis and rule out other causes.
Treatment with daily folic acid supplements is simple and effective — most people improve within days.
It is essential to rule out vitamin B12 deficiency before starting folic acid treatment, as using folic acid alone can mask serious nerve damage.
Eating folate-rich foods like leafy greens, citrus fruits, and fortified cereals helps prevent the condition long-term.
Pregnant women or those planning a pregnancy should speak with their doctor about folic acid supplementation right away.
Always talk to your doctor before starting any new supplement or changing your diet to treat a health condition.
Frequently Asked Questions
What is folic acid deficiency anemia?
Folic acid deficiency anemia occurs when your body lacks enough folate (vitamin B9) to produce healthy red blood cells. Without adequate folate, red blood cells become abnormally large and cannot function properly, reducing your blood’s ability to carry oxygen throughout the body. It is treatable with dietary changes and supplements.
What are the symptoms of folic acid deficiency anemia?
Common symptoms include persistent fatigue, weakness, pale or yellowish skin, shortness of breath, dizziness, and heart palpitations. You may also experience mouth sores, a swollen tongue, irritability, and difficulty concentrating. Symptoms develop gradually as folate stores deplete, often over several weeks or months.
How is folic acid deficiency anemia treated in Canada?
Treatment typically involves daily folic acid supplements, usually 1–5 mg prescribed by a doctor, taken for several months until levels normalize. Increasing folate-rich foods like leafy greens, legumes, and fortified cereals is also recommended. Addressing the underlying cause, such as alcohol use or malabsorption disorders, is essential for full recovery.
How can you prevent folic acid deficiency anemia?
Prevention includes eating folate-rich foods such as spinach, broccoli, lentils, and fortified breads or cereals. Health Canada recommends that people who could become pregnant take a daily folic acid supplement of 0.4–1.0 mg. Limiting alcohol consumption and managing conditions affecting nutrient absorption also significantly reduce your risk.
When should you see a doctor for folic acid deficiency anemia?
See a doctor if you experience persistent fatigue, unexplained weakness, pale skin, or shortness of breath lasting more than a few weeks. Seek prompt medical attention if you are pregnant or planning to conceive, as folate deficiency significantly increases the risk of serious neural tube defects in developing babies.