Folate: Benefits, uses, deficiency, dosage, foods, effects

Folate, a B vitamin found naturally in many foods, is crucial in maintaining our health and well-being. 

This nutrient, essential for DNA synthesis, repair, and methylation, is particularly vital during periods of rapid growth such as pregnancy and infancy. 

Yet, its importance extends beyond these stages, impacting overall health in various ways. 

This blog aims to illuminate the multifaceted benefits of folate, exploring its uses, the risks of deficiency, recommended dosages, and natural food sources. 

Understanding folate’s role can significantly enhance health management, making this knowledge invaluable for anyone striving for a healthier lifestyle.

What is folate?

Folate, often called vitamin B9, is a key player in your body’s cellular machinery. It’s a water-soluble vitamin, meaning your body doesn’t store it, making regular intake through diet or supplements essential [1]. 

This vitamin performs multiple functions, most notably in creating and repairing DNA and other genetic material. It’s also indispensable for cell division, a process vital for growth and development.

You might have heard of folic acid–the synthetic form of folate, commonly added to foods or used in supplements. 

While folate naturally occurs in certain foods, folic acid is more stable, enhancing its effectiveness in fortification and supplementation. 

This is an important distinction because certain individuals may have genetic variations that hinder their ability to convert folic acid into its active form within the body.

During pregnancy, folate is crucial as it significantly reduces the risk of neural tube defects in developing fetuses, highlighting its vital role in embryonic development.

However, its importance extends beyond pregnancy. Folate is integral to maintaining normal levels of homocysteine, an amino acid in the blood [2]. Elevated homocysteine levels are linked to heart disease and stroke.

Understanding folate’s impact on mental health is equally important. It’s been associated with cognitive function, mood regulation, and even the mitigation of certain psychiatric disorders. 

Given its broad spectrum of benefits, ensuring you have adequate folate levels is a key aspect of maintaining good health. 

Folate vs folic acid: Which should you take?

Folate and folic acid, while often used interchangeably, are different forms of vitamin B9. Folate occurs naturally in foods, whereas folic acid is the synthetic form found in supplements and fortified foods.

The key difference lies in their bioavailability: folic acid is more readily absorbed by the body compared to folate from food sources.

Who should take what?

Natural folate

Ideal for most individuals, especially those focusing on a diet-based approach to nutrition. It’s best obtained from leafy greens, legumes, and citrus fruits.

Folic acid

Recommended for individuals with increased needs or those at risk of deficiency, like pregnant women. It’s crucial for preventing birth defects and is often prescribed as a supplement during pregnancy [3].

To know which form best suits your needs, consult your healthcare provider. They can advise on the appropriate dosage and form, considering your diet, lifestyle, and any specific health conditions.

What are the benefits of folate to your health?
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What are the benefits of folate to your health?

Folate offers a host of benefits that extend across various aspects of wellbeing. Understanding these can help you appreciate why maintaining adequate folate levels is so essential.

1. Promotes healthy pregnancy outcomes

A standout benefit of folate is its role in preventing birth defects, particularly neural tube defects like spina bifida in babies. 

If you’re pregnant or planning to become pregnant, ensuring sufficient folate intake is key for your baby’s healthy development.

2. Supports heart health

Folate helps regulate homocysteine levels in the blood. Elevated homocysteine is a known risk factor for heart diseases, including heart attack and stroke. By keeping these levels in check, folate contributes to a healthier heart.

3. Aids in red blood cell formation

This vitamin is crucial for producing red blood cells, which transport oxygen throughout your body. Adequate folate levels prevent types of anemia caused by red blood cell deficiencies [4].

4. Enhances brain health

Folate’s role in brain health is multifaceted. It’s linked to improved cognitive function, especially in older adults, and is believed to play a part in mental and emotional health. 

Some studies suggest that folate may help in managing depression and enhancing the effectiveness of antidepressants [5].

5. May reduce cancer risk

While research is ongoing, some studies indicate that folate might play a role in reducing the risk of certain cancers, like colon, breast, and cervical cancer [6], [7]. 

However, it’s important to balance folate intake, as excessive amounts may have adverse effects.

6. Supports skin health

Emerging research suggests that folate may benefit skin health by aiding in cell repair and possibly protecting against skin damage from the sun.

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What are the primary symptoms of folate deficiency?

Folate deficiency, while preventable, can lead to several health issues if not addressed. Recognizing these symptoms is essential for early intervention and treatment. Here are the primary indicators to watch out for:

1. Fatigue and general weakness

One of the most noticeable symptoms is a persistent feeling of tiredness and lack of energy. This is often due to the reduced efficiency of red blood cells in transporting oxygen throughout the body.

2. Shortness of breath and dizziness

Experiencing breathlessness and feeling lightheaded, especially after physical exertion, can be a sign of folate deficiency. This is again linked to the oxygen-carrying capacity of your blood.

3. Pale skin

A notable physical change can be the paleness of the skin, a result of decreased red blood cell count, or anemia, which is commonly associated with low folate levels.

4. Mood changes and mental fog

Folate is vital for brain health, and its deficiency can lead to mood disturbances, including irritability and depression. Cognitive issues like forgetfulness and difficulty concentrating are also common.

5. Mouth sores and glossitis

Oral health issues like a sore tongue (glossitis), changes in the tongue’s color, and ulcers in the mouth can indicate folate deficiency [8].

6. Hair, skin, and nail changes

Unusual changes in hair, skin, and nails, such as premature graying of hair or brittle nails, may occur.

7. Gastrointestinal issues

Symptoms like diarrhea, loss of appetite, and weight loss can result from impaired gut health due to inadequate folate.

8. Headaches

Regular, unexplained headaches can sometimes be linked to low folate levels.

What is the leading cause of folate deficiency?

Folate deficiency can stem from various causes, each contributing to this vital nutrient’s inadequate supply or absorption. Being aware of these risk factors can help in prevention and early intervention.

1. Dietary insufficiency

The most straightforward cause is a diet lacking in folate-rich foods [9], such as leafy green vegetables, fruits, nuts, and fortified cereals. People who consume a limited variety of foods or have unbalanced diets are at higher risk.

2. Gastrointestinal diseases

Conditions like celiac disease, Crohn’s disease, or intestinal surgeries can impair the body’s ability to absorb folate, leading to a deficiency despite adequate intake.

3. Excessive alcohol consumption

Regular heavy drinking can lead to poor nutrition and decreased folate absorption, making alcoholics particularly susceptible to deficiency.

4. Medications

Some medications, like anticonvulsants and certain anti-inflammatory drugs, can interfere with folate absorption and metabolism.

5. Increased requirement

Certain life stages and conditions, like pregnancy, breastfeeding, and rapid growth phases in children, increase the body’s need for folate, raising the risk of deficiency if intake isn’t adjusted accordingly.

6. Genetic factors

Variations in genes related to folate metabolism can affect the body’s ability to use this vitamin, increasing susceptibility to deficiency.

Understanding these causes and risk factors is pivotal in maintaining adequate folate levels.

If you fall into any of these risk categories, it’s advisable to monitor your folate intake closely and consult a healthcare provider for personalized guidance. 

A proactive approach can significantly reduce the risk of folate deficiency and its associated health complications.

What are the potential health consequences of long-term folate deficiency?

Persistently low levels of folate can have several far-reaching health implications. Being aware of these potential consequences is crucial for motivating appropriate dietary and lifestyle changes.

1. Increased risk of birth defects

For pregnant women, folate deficiency significantly heightens the risk of neural tube defects in the developing fetus, such as spina bifida and anencephaly.

2. Anemia

One of the most direct outcomes is megaloblastic anemia, characterized by the production of abnormally large and inefficient red blood cells, leading to symptoms like fatigue, weakness, and breathlessness.

3. Cardiovascular diseases

Low folate levels are associated with elevated homocysteine levels, a risk factor for heart diseases, including heart attack and stroke.

4. Impaired cognitive function

Chronic folate deficiency can affect the brain, potentially leading to decreased cognitive function, memory problems, and an increased risk of dementia, particularly in older adults.

5. Mental health issues

There’s also a link between low folate levels and mental health disorders, including depression and mood disturbances.

6. Compromised immune function

Adequate folate is essential for a robust immune system; deficiency can weaken the body’s ability to fight infections and diseases.

How can you avoid a folate deficiency?

Avoiding folate deficiency is key to maintaining good health. Here are practical ways to ensure you get enough of this essential nutrient:

1. Diversify your diet

Incorporate a variety of folate-rich foods into your daily meals. Leafy green vegetables like spinach and kale, fruits such as oranges and bananas, legumes, nuts, and seeds are excellent natural sources. Also, include fortified foods like cereals and bread, which have added folic acid.

2. Consume alcohol moderately

Excessive alcohol intake can interfere with folate absorption. Limiting alcohol or consuming it in moderation can help maintain adequate folate levels.

3. Supplement when necessary

Supplements may be necessary in certain situations, like pregnancy, breastfeeding, or specific medical conditions. 

Consult a healthcare provider to determine if supplements are right for you and at what dosage.

supplement when necessary
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4. Get regular health check-ups

Regular blood tests can monitor your folate levels, particularly if you’re at risk of deficiency due to dietary restrictions, certain medications, or health conditions.

5. Educate yourself

Stay informed about the importance of folate and sources of this nutrient. Understanding how it affects your health can motivate you to make healthier dietary choices.

What foods are high in folate?

Ensuring you get enough folate is simpler than you might think, especially when you know which foods are rich in this essential nutrient. Here’s a list of folate-packed foods to incorporate into your diet:

1. Leafy green vegetables

Greens like spinach, kale, and Swiss chard are not only loaded with folate but also offer a range of other health benefits. A cup of cooked spinach, for instance, provides about 100 mcg of your daily folate needs [10].

2. Legumes

Beans, lentils, and peas are excellent sources. One cup of cooked lentils delivers almost 90% of your daily requirement.

3. Asparagus

This versatile vegetable not only brings a significant amount of folate to your plate but is also rich in other nutrients. Half a cup of cooked asparagus gives you about 134 mcg of folate [11].

4. Eggs

They are a good source of folate, with one large egg providing about 10% of your daily needs. Plus, they’re packed with other essential nutrients.

5. Beets

These root vegetables are great for folate, fiber, potassium, and vitamin C. A cup of boiled beets offers around 34% of your daily folate requirement.

6. Citrus fruits

Oranges, grapefruits, lemons, and limes are good sources. One large orange, for example, can provide about 10% of your daily folate needs.

7. Brussels sprouts

A half-cup serving of cooked Brussels sprouts contains about 47 mcg of folate, contributing to your daily intake alongside other nutrients like vitamins K and C.

8. Nuts and seeds

Particularly almonds and sunflower seeds, these are not only folate-rich but also great for snacking or adding crunch to salads and other dishes.

9. Fortified grains

Many cereals and breads are fortified with folic acid, making them an easy way to boost your intake, especially if you’re on a vegetarian or vegan diet.

10. Avocado

A nutrient-dense fruit, avocado is another excellent source, with one whole fruit providing about 21% of your daily folate needs.

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How does the body absorb folate from different sources?

Bioavailability, or how well a nutrient is absorbed and used by the body, is a key factor in folate intake. Folate’s bioavailability varies depending on its dietary source, which is crucial for optimal nutrition.

1. Natural folate in foods

Folate found naturally in foods like leafy greens, fruits, and legumes has a lower bioavailability, typically around 50%. This is due to the complexity of its structure, which requires additional processing by the body before it can be utilized.

2. Folic acid in fortified foods and supplements

Folic acid, the synthetic form used in supplements and added to fortified foods, has a higher bioavailability, around 85-100% [12]. This is because it’s more readily absorbed by the body, especially when taken on an empty stomach.

3. Impact of cooking

Cooking can significantly reduce the folate content in foods [13]. For example, boiling vegetables can cause folate to leach into the water. To minimize loss, opt for steaming or microwaving.

4. Genetic factors

Individual genetic variations can affect the conversion of consumed folate into its active form in the body. Some people may have a reduced ability to metabolize folic acid efficiently.

Considering these factors is important for achieving the right balance of folate. Those relying primarily on plant-based sources may need to consume larger amounts to meet their needs, whereas those taking supplements or eating fortified foods should be mindful of not exceeding recommended levels. 

As always, consulting with a healthcare provider can provide personalized guidance based on your dietary habits and health needs.

How much folate should you take daily?

Understanding the recommended dosage of folate is essential for reaping its benefits while avoiding potential risks associated with overconsumption. 

The Recommended Dietary Allowance (RDA) varies based on age, gender, and life stage [14]:


  • 0-6 months: 65 micrograms (mcg) per day.
  • 7-12 months: 80 mcg per day.


  • 1-3 years: 150 mcg per day.
  • 4-8 years: 200 mcg per day.
  • 9-13 years: 300 mcg per day.

Teens and adults:

  • Males and females (14 years and older): 400 mcg per day.
  • Pregnant women: 600 mcg per day.
  • Breastfeeding women: 500 mcg per day.

These guidelines are designed to meet the needs of most people in these groups. However, certain conditions and life stages may necessitate a different intake:

Pregnancy and lactation: The increased dosage during pregnancy and breastfeeding supports fetal development and the mother’s health. Folic acid supplements are often recommended for pregnant women to meet these higher needs.

Individuals with certain medical conditions: People with conditions like celiac disease or certain genetic mutations may require more folate. 

Similarly, those on medications that affect folate metabolism might need higher doses.

Upper intake levels: While folate from foods is not associated with adverse effects, there is an upper limit set for folic acid (the synthetic form found in supplements and fortified foods) to avoid potential negative effects. For adults, this limit is 1,000 mcg per day.

It’s important to note that these dosages are general guidelines. Folate needs can vary significantly based on individual health, dietary patterns, and genetic factors. 

Excessive intake of folic acid, especially from supplements, can mask vitamin B12 deficiency and lead to other health issues.

What are the side effects and interactions of folate?
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What are the side effects and interactions of folate?

While folate is essential for health, like any nutrient, it can cause side effects and interact with other substances when taken in excess or under specific circumstances. Being aware of these can help in managing your folate intake safely.

Side effects of excessive folate intake

1. Masking of vitamin B12 deficiency

High levels of folate, especially in the form of supplements, can mask the symptoms of vitamin B12 deficiency, leading to a delay in diagnosis and treatment.

2. Sleep disorders and mood changes

Over-supplementation has been linked to sleep disturbances, irritability, and overexcitement in some individuals.

3. Seizure risk in epileptic patients

High doses of folic acid may trigger seizures in people with epilepsy, particularly if their medication levels are not well-controlled.

4. Increased risk of cancer

Some research suggests that excessive folic acid intake might stimulate pre-existing cancer cells, although this area requires more study [15].

Interactions with medications

1. Antiepileptic drugs (AEDs)

Certain AEDs can interfere with folate metabolism, reducing its levels in the body. Conversely, folate might affect the efficacy of these drugs.

2. Methotrexate

Commonly used for cancer and autoimmune diseases, methotrexate can lower folate levels. Folic acid supplementation is often prescribed alongside to mitigate side effects.

3. Sulfasalazine

Used in inflammatory bowel disease, sulfasalazine can impair folate absorption, necessitating supplementation in some cases.

4. Birth control pills

Oral contraceptives may lower folate levels, although the clinical significance of this interaction is still unclear.

Closing thoughts

Throughout this blog, we’ve explored the crucial role of folate in health, from its benefits in pregnancy and heart health to its necessity in preventing anemia and supporting mental well-being. 

We’ve discussed the risks associated with folate deficiency, the recommended dosages for different life stages, and the rich dietary sources of this essential nutrient. 

Additionally, understanding the differences between natural folate and synthetic folic acid is vital for tailored supplementation. 

Folate’s importance in a balanced diet is clear, underscoring the need for awareness and proactive management of its intake to maintain optimal health and prevent potential deficiencies.


Is folate same as folic acid?

Folate and folic acid are forms of vitamin B9, but they are not the same. Folate occurs naturally in foods, while folic acid is the synthetic form used in supplements and fortified foods.

Is it OK to take folate instead of folic acid?

Yes, it is generally okay to take folate instead of folic acid, especially from dietary sources. Natural folate can be a preferable option for those focusing on obtaining nutrients through food.

When should I take folic acid morning or night?

Folic acid can be taken at any time of day, but it’s often recommended to take it in the morning. Consistency in timing, rather than the specific time of day, is more important for effectiveness.

Who cannot take folate?

Individuals with a vitamin B12 deficiency should be cautious about taking folate, as it can mask the symptoms of the deficiency. Also, people with certain cancers or epilepsy should consult a healthcare provider before taking folate.

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