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Ferrous Sulfate vs. Iron Glycinate: Know the Difference

Shumaila Saeed
By Shumaila Saeed || Published on December 28, 2023
Ferrous Sulfate is a form of iron combined with sulfate, commonly used to treat iron deficiency anemia, while Iron Glycinate is a chelated form of iron bound to glycine, known for its enhanced absorption and gentler impact on the digestive system.
Ferrous Sulfate vs. Iron Glycinate

Key Differences

Ferrous Sulfate is a traditional form of iron supplement, used extensively to treat iron deficiency and anemia. It is iron (Fe) combined with sulfate ions. Iron Glycinate, alternatively, is a chelated form of iron where the iron is bound to glycine, an amino acid. This chelation process is believed to enhance the absorption of iron in the body.
Shumaila Saeed
Shumaila Saeed
Dec 28, 2023
Regarding absorption and gastrointestinal effects, Ferrous Sulfate is effective but often associated with gastrointestinal side effects like constipation and nausea. Iron Glycinate, on the other hand, is reputed to be gentler on the digestive system, making it a preferred choice for individuals with sensitive stomachs.
Shumaila Saeed
Shumaila Saeed
Dec 28, 2023
In terms of bioavailability, Ferrous Sulfate is readily absorbed, especially when taken on an empty stomach, but its absorption can be affected by certain foods and medications. Iron Glycinate, due to its chelated form, is less impacted by dietary factors and may provide more consistent absorption rates.
Shumaila Saeed
Shumaila Saeed
Dec 28, 2023
Ferrous Sulfate is widely available and often more affordable than other iron supplements. It's a go-to option in many medical scenarios for quick iron replenishment. In contrast, Iron Glycinate is typically more expensive but preferred for long-term supplementation due to its higher tolerance and lower risk of digestive discomfort.
Shumaila Saeed
Shumaila Saeed
Dec 28, 2023
While Ferrous Sulfate is a standard treatment for iron deficiency, its potential side effects can limit its use. Iron Glycinate offers a viable alternative, especially for those who have previously experienced adverse effects from traditional iron supplements, seeking a more tolerable option.
Shumaila Saeed
Shumaila Saeed
Dec 28, 2023
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Comparison Chart

Composition

Iron combined with sulfate ions.
Iron chelated with glycine.
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Shumaila Saeed
Dec 28, 2023

Gastrointestinal Impact

Often causes side effects like constipation.
Gentler on the digestive system.
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Shumaila Saeed
Dec 28, 2023

Absorption

High, but affected by dietary factors.
Enhanced due to chelation, less diet impact.
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Shumaila Saeed
Dec 28, 2023

Cost and Availability

More affordable, widely available.
More expensive, selectively available.
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Shumaila Saeed
Dec 28, 2023

Ideal Use

Quick iron replenishment, acute deficiency.
Long-term supplementation, sensitive stomachs.
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Shumaila Saeed
Dec 28, 2023
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Ferrous Sulfate and Iron Glycinate Definitions

Ferrous Sulfate

Commonly used to replenish iron levels in the blood.
After blood loss, ferrous sulfate helped restore my iron levels.
Shumaila Saeed
Shumaila Saeed
Dec 11, 2023

Iron Glycinate

Known for being gentler on the stomach than other iron forms.
Iron glycinate doesn't cause me any digestive issues.
Shumaila Saeed
Shumaila Saeed
Dec 11, 2023

Ferrous Sulfate

Iron combined with sulfate ions in a compound.
Ferrous sulfate is often found in over-the-counter iron pills.
Shumaila Saeed
Shumaila Saeed
Dec 11, 2023

Iron Glycinate

A preferred choice for long-term iron supplementation.
For ongoing supplementation, my doctor recommended iron glycinate.
Shumaila Saeed
Shumaila Saeed
Dec 11, 2023

Ferrous Sulfate

An affordable and widely used form of iron.
Ferrous sulfate is a cost-effective treatment for anemia.
Shumaila Saeed
Shumaila Saeed
Dec 11, 2023
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Iron Glycinate

Less likely to be affected by dietary factors in absorption.
I can take iron glycinate with meals without worrying about absorption.
Shumaila Saeed
Shumaila Saeed
Dec 11, 2023

Ferrous Sulfate

A supplement that can cause gastrointestinal side effects.
I experienced stomach upset with ferrous sulfate.
Shumaila Saeed
Shumaila Saeed
Dec 11, 2023

Iron Glycinate

A chelated form of iron bound to glycine for better absorption.
I switched to iron glycinate for its improved absorption.
Shumaila Saeed
Shumaila Saeed
Dec 11, 2023

Ferrous Sulfate

A type of iron supplement used to treat anemia.
The doctor prescribed ferrous sulfate for my iron deficiency.
Shumaila Saeed
Shumaila Saeed
Dec 11, 2023

Iron Glycinate

A more expensive but often more tolerable iron supplement.
Iron glycinate is pricier, but it's worth it for the tolerance.
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Shumaila Saeed
Dec 11, 2023

Repeatedly Asked Queries

What is Iron Glycinate?

A chelated form of iron bound to glycine.
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Shumaila Saeed
Dec 28, 2023

Can Ferrous Sulfate cause constipation?

Yes, it's a common side effect.
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Shumaila Saeed
Dec 28, 2023

Which is more affordable, Ferrous Sulfate or Iron Glycinate?

Ferrous Sulfate is usually more affordable.
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Shumaila Saeed
Dec 28, 2023

What is Ferrous Sulfate?

An iron supplement combined with sulfate ions.
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Shumaila Saeed
Dec 28, 2023

Are Ferrous Sulfate and Iron Glycinate equally effective?

Both are effective, but their tolerability varies.
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Shumaila Saeed
Dec 28, 2023

Does Ferrous Sulfate interact with other medications?

Yes, it can interact with certain drugs.
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Shumaila Saeed
Dec 28, 2023

How do Ferrous Sulfate and Iron Glycinate differ in composition?

Ferrous Sulfate is iron with sulfate; Iron Glycinate is iron with glycine.
Shumaila Saeed
Shumaila Saeed
Dec 28, 2023

Is Iron Glycinate better absorbed than Ferrous Sulfate?

Its chelated form may enhance absorption.
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Shumaila Saeed
Dec 28, 2023

Which is more gentle on the stomach, Ferrous Sulfate or Iron Glycinate?

Iron Glycinate is generally gentler on the stomach.
Shumaila Saeed
Shumaila Saeed
Dec 28, 2023

Is Iron Glycinate safe during pregnancy?

It's often used, but consult a doctor.
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Shumaila Saeed
Dec 28, 2023

Can I overdose on Ferrous Sulfate?

Yes, iron overdose is a risk; follow dosage instructions.
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Shumaila Saeed
Dec 28, 2023

Can I take Ferrous Sulfate with food?

It's best taken on an empty stomach for optimal absorption.
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Shumaila Saeed
Dec 28, 2023

Who should take Ferrous Sulfate?

Those needing quick iron replenishment.
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Shumaila Saeed
Dec 28, 2023

Does Iron Glycinate cause fewer side effects?

Generally, it causes fewer gastrointestinal issues.
Shumaila Saeed
Shumaila Saeed
Dec 28, 2023

Who should choose Iron Glycinate?

Individuals seeking a gentler, long-term supplement.
Shumaila Saeed
Shumaila Saeed
Dec 28, 2023

Is Iron Glycinate suitable for long-term use?

Yes, especially for those with sensitive stomachs.
Shumaila Saeed
Shumaila Saeed
Dec 28, 2023

Can children take Ferrous Sulfate?

Under medical supervision, yes.
Shumaila Saeed
Shumaila Saeed
Dec 28, 2023

Is Iron Glycinate a good option for anemia?

Yes, especially for those sensitive to other forms.
Shumaila Saeed
Shumaila Saeed
Dec 28, 2023

Is Iron Glycinate vegan-friendly?

It depends on the brand; check the label.
Shumaila Saeed
Shumaila Saeed
Dec 28, 2023

How quickly does Ferrous Sulfate work?

It can improve iron levels within weeks.
Shumaila Saeed
Shumaila Saeed
Dec 28, 2023

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About Author
Shumaila Saeed
Written by
Shumaila Saeed
Shumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.

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