Different Types Of Iron Tablets And Their Absorption Rates

Types Of Iron Tablets

Iron, an essential mineral, plays a crucial role in oxygen transport, energy production, and cellular function. For individuals with iron deficiency anemia (IDA) or those at risk of developing IDA, iron supplements are often recommended. However, with various types of iron tablets available, understanding their absorption rates becomes essential in making informed choices.

Delving into Iron Tablet Types

Iron supplements in Pakistan come in a variety of forms, each with its own unique characteristics and absorption rates. Let's explore the most common types:

Ferrous sulfate

The most widely used and cost-effective form of iron supplement, ferrous sulfate offers high absorption rates of around 20% to 25%. However, it can cause gastrointestinal side effects such as constipation or diarrhea.

Ferrous fumarate

This form of iron is slightly less absorbed than ferrous sulfate, with an absorption rate of around 15% to 20%. It may be better tolerated by individuals who experience gastrointestinal issues with ferrous sulfate.

Ferrous gluconate

With an absorption rate similar to ferrous fumarate, ferrous gluconate is another option for those with sensitive stomachs.

Ferrous succinate

This form of iron offers a slightly higher absorption rate, around 18% to 22%, and may be better absorbed by individuals with certain health conditions that affect iron absorption.

Polysaccharide iron complex (PIC)

This relatively newer form of iron is coated with a carbohydrate complex, aiming to improve absorption and reduce gastrointestinal side effects. However, more research is needed to fully establish its efficacy.

    Absorption Rates: A Comparative Glance

    The absorption rate of iron from dietary supplements varies depending on the form of iron used. Here's a summary of absorption rates for the most common types:

    Iron Tablet Type Absorption Rate
    Ferrous sulfate 20% to 25%
    Ferrous fumarate 15% to 20%
    Ferrous gluconate 15% to 20%
    Ferrous succinate 18% to 22%
    Polysaccharide iron complex (PIC) Approximately 15%
    Factors Influencing Iron Absorption

    While the type of iron tablet plays a significant role in absorption, other factors can also influence how well the body utilizes iron from supplements. These include:

    Vitamin C

    Consuming vitamin C-rich foods or supplements alongside iron tablets can enhance iron absorption.


    Calcium can interfere with iron absorption, so it's best to avoid taking iron supplements and calcium supplements at the same time.


    Antacids can also reduce iron absorption, so it's advisable to take iron supplements at least two hours before or after taking antacids.

    Consulting Your Healthcare Provider

    Choosing the right iron supplement and determining the appropriate dosage is crucial for optimal iron absorption and achieving desired health outcomes. It's essential to consult with your healthcare provider to assess your individual iron needs and recommend the most suitable form and dosage of iron supplement for you.