How to Increase Iron Levels

Your body needs iron to make a protein called hemoglobin. This protein is responsible for carrying oxygen to your body’s tissues, which is essential for your tissues and muscles to function effectively. If you are iron deficient, your body can’t get enough oxygen. Fortunately, an iron-rich diet can help you increase iron levels in your body.

Causes of Iron Deficiency

Anemia occurs when you have a level of red blood cells in your blood that is lower than normal. Iron deficiency anemia is the most common type of anemia, and it occurs when your body doesn’t have enough of the mineral iron. Causes of iron deficiency are listed below.

1. Inadequate Iron Intake

Eating too little iron over an extended amount of time can cause a shortage in your body. Because iron is essential during times of rapid growth and development, pregnant women and young children may need even more iron-rich foods in their diet.

2. Heavy Periods

In women, periods are the most common cause of iron deficiency anemia. Usually, only women with heavy periods develop iron deficiency anemia. If you have heavy menstrual bleeding over several consecutive menstrual cycles, it’s known as menorrhagia.

3. Inability to Absorb Enough Iron

Even if your iron intake is enough, your body may not be able to absorb it. This can happen if you have intestinal surgery or a disease of the intestine (such as celiac disease or Crohn’s disease).

  • Prescription medicines that reduce stomach acid can also interfere with iron absorption.
4. Exercise

Athletes are prone to iron deficiency because exercise increases the body’s need for iron in a number of ways. For example, hard training promotes red blood cell production, while iron is lost through sweating.

5. Internal Bleeding

Certain medical conditions can cause internal bleeding, which can lead to iron deficiency anemia. Examples include an ulcer in your stomach, polyps (tissue growths) in the colon or intestines, or colon cancer. Regular use of pain relievers can also cause bleeding in the stomach. 

How to Increase Iron Levels

1. Beta-Carotene

Beta-carotene is one of more than 100 carotenoids that occur naturally in plants and animals. It enables the body to produce vitamin A. In studies of the effects of vitamin A and beta-carotene on absorption of iron, vitamin A did not significantly increase iron absorption under the experimental conditions employed. However, beta-carotene significantly increased absorption of the metal. Moreover, in the presence of phytates or tannic acid, beta-carotene generally overcame the inhibitory effects of both compounds depending on their concentrations (1).

Like vitamin E, beta-carotene is an excellent anti-oxidant, but you should take any of these judiciously. Studies have shown taking supplemental beta-carotene can enhance the progression of some cancers, and that taking vitamin A habitually in amounts of 25,000 IU can cause liver problems. The best source of these nutrients is whole foods.

Some of the foods containing beta-carotene are apricots, carrots, beets and beet greens, collard greens, peaches, spinach, and sweet potatoes.

2. Leafy Greens and Vitamin C

Consume leafy and cruciferous green vegetables, such as spinach, collard greens, broccoli and kale, along with meals containing red meat or foods containing vitamin C, such as orange juice and tomatoes. Absorption of the non-heme iron found in plants improves when these foods are paired with heme iron or vitamin C.

3. Meat and Seafood

Most animal proteins provide iron, and red meat is a particularly good source of dietary iron. Even small portions of animal proteins on a regular basis can help many individuals obtain healthy levels of iron in the blood. Eat oysters and other shellfish. One serving of oysters provides 44% (8 mg) of the recommended daily iron intake for most adults.

  • Organ meats such as beef liver can also be very rich in iron. 3 ounces of beef liver provides 28% (5 mg) of your daily iron intake.
4. Legumes

Soybeans, kidney beans, white beans, lentils, peanuts (and peanut butter), chickpeas, and other legumes can offer a very healthy source of iron.

  • A cup of white beans provides 44% (8 mg) of the daily recommended iron intake for most adults.
5. Iron Supplements

If you are unable to derive enough iron from your food, it is suggested to take iron supplements after consulting your doctor. Depending on your individual body requirement the doctor will suggest the dose of the supplements. Remember that taking iron supplements can change your stool color to black, but it is very normal and nothing to be alarmed about.

What to Avoid to Increase Iron Levels

1. Eggs

Eggs contain a compound that impairs iron absorption. Phosphoprotein called phosvitin is a protein with an iron binding capacity that may be responsible for the low bioavailability of iron from eggs. This iron inhibiting characteristic of eggs is called the “egg factor”. The egg factor has been observed in several separate studies. One boiled egg can reduce absorption of iron in a meal by as much as 28 percent.

2. Calcium

Calcium is an essential mineral, which means the body gets this nutrient from diet. Calcium is found in foods such as milk, yogurt, and cheese and is the only known substance to inhibit absorption of both non-heme and heme iron (2). Where 50 mg or less of calcium has little if any effect on iron absorption, calcium in amounts 300-600 mg inhibit the absorption of heme iron similarly to non-heme iron.

One cup of skimmed milk contains about 300 mg of calcium. When calcium is recommended by a doctor, as is often the case for women trying to prevent bone loss, these supplements can be taken at bedtime. Calcium supplements are best taken with vitamin D and in a citrate rather than carbonate form.

3. Foods High in Oxalates

If you consume large amounts of tea with your meals, you may not be receiving an adequate amount of iron from those foods. Tea contains oxalates – oxalic acid compounds that impair the absorption of non-heme iron.

  • Oxalates can also be found in spinach, nuts, rhubarb, chocolate, kale, beets, wheat bran, strawberries and herbs such as basil and parsley.
4. Coffee and Tea

Both coffee and tea respectively inhibit iron absorption by as much as 39 and 60 percent when consumed with a meal. Polyphenols are responsible for this inhibitory action and are present in larger amounts in beverages such as coffee, tea and wine (3, 4). Although polyphenols provide many disease-preventing benefits, they are best consumed between meals to ensure maximum absorption of iron from foods in each meal.

5. Soy

Soy has also been found to inhibit iron absorption due to the presence of an acid called phytate, which binds with iron and prevents its absorption (5). The inclusion of soy in the American diet is far greater than many realize and it can be found in many processed food items.

6. Foods High in Phytates

Foods high in phytates can reduce the amount of iron your body absorbs from iron-rich foods (6, 7). Even low levels of phytates have a strong inhibitory effect on your body’s ability to absorb iron from foods. Phytates can reduce iron absorption from food by approximately 50-65 percent.

  • Phytates can be found in walnuts, sesame, almonds, dried beans, lentils, peas.

Cooking Tips to Increase Iron Levels

A study found that cooking with cast-iron pans and pots increased the iron content of foods (8).

  • Cook foods in cast-iron pans or pots. Foods simmered in iron absorb some of the mineral and pass it along to you when you eat the food.
  • Acidic foods such as lemon juice, tomato sauce, and red wine are especially prone to absorbing iron from cooking pots.


  • It is possible to consume too much iron or have it build up in the body to unsafe levels due to disease. This is called iron overload or hemochromatosis and can cause organ damage.
  • Iron supplements may make your stools darker or even black. Don’t worry; this is normal.

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