chemistry

Iron(II) glycinate

Iron(II) glycinate is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Iron(II) glycinate rather than just read about it. In short: Iron(II) glycinate refers to an iron complex of glycinate. Such species are transition metal amino acid complexes.

Key takeaways

Iron(II) glycinate belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Iron(II) glycinate to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Iron(II) glycinate from memory before moving on to harder problems.

Reference excerpt

Iron(II) glycinate refers to an iron complex of glycinate. Such species are transition metal amino acid complexes. Some compositions are used as dietary supplements and in food fortification in the place of other sources of iron, often under the trademark Ferrochel. It is sometimes sold as a hydrochloride salt.

Structure The structure of one glycinate complex of iron(II) has been determined by X-ray crystallography. The octahedral complex features two bidentate glycinate ligands as well as two aquo ligands.

Synthesis Iron(II) glycinate is claimed to form when iron powder is treated with a two-fold molar excess of glycine in a citric acid solution. The citric acid acts as an antioxidant to prevent oxidation of Fe(II) to the more insoluble and therefore less bioavailable Fe(III) form:

Fe + 2 H2NCH2COOH → Fe(H2NCH2COO)2 + H2 Commercial formulations retain the citric acid as a preservative, and include silicon dioxide (0.01%) and maltodextrin (2%).

Safety Since 2001, iron(II) glycinate has been generally regarded as safe by the Food and Drug Administration (FDA), with a No Observable Adverse Effect Level (NOAEL) of at least 500 mg kg−1 rat body weight. Compared to other iron salts, such as iron sulfate, it is associated with fewer adverse gastrointestinal effects and a higher bioavailability. For these reasons, it is a promising supplement for those with iron-deficiency anemia, and has shown significant increases in plasma ferritin, a protein that stores iron. The European Food Safety Authority (EFSA) has evaluated ferrous bisglycinate for use in foods and supplements.

Applications Iron(II) glycinate is an iron source in pharmaceutical products, dietary supplements, and fortified foods. Due to its comparatively high bioavailability and good gastrointestinal tolerability, it is used in products intended for the prevention and treatment of iron deficiency, including formulations for sensitive populations.

References

Illustrations

Worked examples

Example 1 — a first encounter with Iron(II) glycinate

Start with the simplest possible case. Write down what Iron(II) glycinate claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Iron(II) glycinate before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Iron(II) glycinate ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Iron(II) glycinate

In research: Iron(II) glycinate appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Iron(II) glycinate in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Iron(II) glycinate is common in secondary-school and first-year university syllabi. It links to neighbouring topics Glycinates, Iron(II) compounds, Iron complexes, so understanding it makes those chapters shorter.
In everyday life: Look for Iron(II) glycinate outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Iron(II) glycinate in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Iron(II) glycinate means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Iron(II) glycinate out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Iron(II) glycinate in simple terms?

Iron(II) glycinate refers to an iron complex of glycinate. Such species are transition metal amino acid complexes.

Why does Iron(II) glycinate matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Iron(II) glycinate?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Iron(II) glycinate.