Food grade Ferrous Bisglycinate CAS 20150-34-9

 What is Ferrous Bisglycinate?

Ferrous bisglycinate, also known as ferrous glycinate (or ferrous bisglycinate or chelated glycinate), is an amino acid chelate iron formed by the chelation of ferrous ions (Fe²⁺) with two glycine molecules. Its chemical formula is:

C4H8FeN2O4

Glycine is one of the most common amino acids in the human body and a basic building block of proteins; iron is an essential trace element that participates in hemoglobin synthesis, oxygen transport, and energy metabolism. Therefore, structurally, ferrous glycinate is composed of two types of components that are familiar to the human body: glycine and ferrous ions.

Compared to traditional inorganic iron salts (such as ferrous sulfate and ferrous chloride), the most significant structural feature of ferrous glycinate is that the iron ion is "wrapped" by two glycine molecules, forming a stable cyclic chelate structure. This chelate structure makes it difficult for the iron ion to combine with anti-nutritional factors such as phytic acid, oxalic acid, and tannins in the gastrointestinal tract to form insoluble precipitates, thereby significantly improving the absorption and utilization rate of iron.

Food-grade ferrous glycinate is typically a light yellow-green to brownish-yellow powder or fine granules, slightly soluble in water, with almost no metallic taste, and has a far less impact on the color and flavor of food than traditional iron salts. This low reactivity makes it particularly suitable for addition to food systems that are sensitive to color and taste.

Food-grade ferrous glycine refers to ferrous glycine products whose production, purification, quality control, packaging, and transportation meet relevant food standards. It differs from ordinary industrial-grade or feed-grade ferrous glycine, primarily in the following aspects:

1. Higher purity requirements

Food-grade products typically require stable main content, chelation rate to meet standards, and low free iron content, making them suitable for food processing or nutritional fortification.

2. Stricter safety standards

Food-grade ferrous glycine needs to be strictly controlled for heavy metals such as lead, arsenic, mercury, and cadmium, as well as other impurities that may affect food safety. All hygiene indicators must meet the relevant standards for food additives or food fortifiers.

3. Production management is more standardized.

Food-grade products typically need to meet the production requirements for food additives or food fortifiers, and the production environment, equipment cleanliness, packaging materials, and batch traceability are all more stringent.

Main Uses of Food-Grade Ferrous Bisglycinate

1. Food iron fortification – a preferred alternative to traditional iron salts

Iron deficiency is one of the most common micronutrient deficiencies worldwide. In the food industry, iron fortification of staple foods, condiments, and processed foods is an important public health nutritional intervention. However, traditional iron salts (such as ferrous sulfate and ferrous fumarate) face three major challenges in practical application:

- Promotes fat oxidation, leading to a rancid taste in food.

- Reacts with polyphenols, tannins, etc. in food, causing discoloration.

- A strong metallic taste, affecting the product's flavor.

Ferrous glycinate outperforms traditional iron salts in these three aspects due to its stable chelate structure and low reactivity. It does not readily catalyze fat oxidation, has minimal impact on food color, and exhibits almost no perceptible metallic taste.

Possible application scenarios include:

- Iron-fortified flour and cereal breakfast

- Iron-fortified biscuits, bread, and other baked goods

- Iron-fortified dairy products and plant-based protein drinks

- Iron-fortified seasonings (such as fish sauce, soy sauce, etc.)

- Iron-fortified rice cereal, noodles and other staple food products

In the food industry, the significance of choosing ferrous glycine for iron fortification includes:

- Ensuring iron content without compromising product flavor

- Maintain product appearance stability and reduce the risk of discoloration.

- Extend product shelf life

- Provides higher iron bioavailability

2. Dietary supplements – the core ingredient in iron supplement products

Ferrous glycinate is one of the most important iron sources in the current dietary supplement market. Compared with traditional iron salts such as ferrous sulfate, the core advantage of ferrous glycinate lies in its different absorption mechanism.

Traditional inorganic iron salts are absorbed in the gastrointestinal tract as free iron ions, which are easily interfered with by components such as phytic acid, tannins, calcium, and zinc in food, and the actual absorption rate is usually only 5% to 10%. In contrast, ferrous glycinate is absorbed by intestinal mucosal cells in the form of a complete chelated molecule, bypassing the traditional iron ion competitive absorption channel. Therefore, it is less affected by dietary factors, and its absorption rate can be 2 to 4 times that of traditional iron salts.

In the field of dietary supplements, ferrous glycine can be used for:

- Iron supplement tablets and capsules

- Iron oral solution and drops

Iron supplement gummies and chewable tablets

- Multivitamin and mineral tablets

- Nutritional supplements specifically for women

- Pregnancy multivitamins

- Iron supplements for children

3. Infant formula – meeting the iron needs of a delicate digestive system.

Infancy is a high-risk period for iron deficiency. Full-term infants typically have enough iron stored in their bodies for only 4-6 months at birth, after which they need to supplement with exogenous iron through complementary foods or formula. Because infants' intestinal barrier function is not yet fully mature, choosing a suitable iron source is particularly crucial.

The advantages of using ferrous glycinate in infant formula include:

- Low gastrointestinal irritation, making it more suitable for the delicate digestive systems of infants and young children.

- Absorption is not significantly affected by other nutrients in breast milk or formula.

- Mild metallic taste, easily accepted by infants and young children through formula adjustments.

- Minimal impact on the color and flavor of formula milk powder and rice cereal.

The food items that may be involved include:

- Infant formula (Stage 1, Stage 2, Stage 3)

- Infant rice cereal and cereal complementary foods

- Baby fruit puree and vegetable puree

- Infant meat puree

- Infant formula for special medical purposes

4. Sports nutrition and functional foods

Athletes, high-intensity trainees, vegetarians, and women during menstruation are at high risk of iron deficiency. Ferrous glycine is commonly used in sports nutrition products and functional foods as a source of daily iron maintenance and supplementation.

Possible applications:

- Protein powder and meal replacement powder

- Functional beverages and electrolyte drinks

- Energy bars and nutrition bars

- Vegetarian nutritional supplements

- Sports nutrition products for women

- Meal replacement products for weight management

Among these products, the value of ferrous glycine lies not only in its iron supplementation but also in its ability to maintain the product's flavor. The taste and flavor of sports nutrition products directly impact consumers' willingness to continue using them, and ferrous glycine's low odor characteristic offers a significant advantage in this regard.

5. Overall advantages of ferrous glycinate compared to other iron sources

Based on the above application scenarios, the comprehensive advantages of food-grade ferrous glycine in food and nutritional products can be summarized as follows:

High bioavailability:

It is absorbed in the form of complete chelated molecules, and is not inhibited by common food components such as phytic acid and tannins. Its iron absorption rate is significantly higher than that of inorganic iron salts.

Good gastrointestinal tolerance:

Since there is no direct irritation of the gastrointestinal mucosa by free iron ions, the incidence of adverse reactions such as nausea, stomach pain, and constipation is significantly lower than that of ferrous sulfate.

Food matrix friendly:

It does not catalyze fat oxidation, does not cause significant discoloration, and has almost no perceptible metallic taste, making it suitable for addition to foods with high sensory quality requirements.

Wide range of formulation compatibility:

It can be used in a low pH to near-neutral range, and is compatible with a variety of vitamins, minerals and food ingredients without easily causing antagonistic effects.

Summary

Ferrous bisglycinate, also known as ferrous glycine or ferrous diglycine, is an amino acid chelate iron formed by the chelation of ferrous ions with two glycine molecules.

In our daily lives, we mainly come into contact with ferrous glycine through online channels such as purchasing iron supplements, iron-fortified foods, infant formula, sports nutrition products, and special medical purpose formula foods.

In the food-grade field, its core applications revolve around its three main characteristics: "high iron absorption rate + low gastrointestinal irritation + food matrix friendliness". It is mainly used in food iron fortification, dietary supplements, infant formula, sports nutrition formula, etc., and is an important upgraded alternative to traditional inorganic iron salts.