2'-Fucosyllactose: benefits, dosage, contraindications

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2'-Fucosyllactose (2'-FL) is a sugar composed of fucose, a simple sugar, and lactose, the primary sugar in milk. Naturally present in human breast milk, 2'-FL is also industrially produced for infant formulas and dietary supplements. 2'-FL is found in human milk at an average concentration of 2.3 g/L, representing 20 to 50% of total fucosylated oligosaccharides. It is synthesized from lactose and L-fucose by a specific enzyme, then converted into lacto-N-fucopentaose I, an oligosaccharide containing terminal fucose, by alpha-1-2-fucosyltransferase and L-fucose. The high concentration of 2'-FL in breast milk highlights its importance for infant development. Recognized for its potential health benefits, 2'-FL exhibits prebiotic, antibacterial, antiviral, and immunomodulatory properties. It is considered "generally recognized as safe" by the Food and Drug Administration (FDA) and has been approved as a novel food by the European Food Safety Authority (EFSA).

Other name(s) 

2'-FL, FUT 2

Scientific name(s)

2'-Fucosyllactose

Family or group: 

Carbohydrates


Indications

Rating methodology

EFSA approval.

Several clinical trials (> 2) randomized controlled with double blind, including a significant number of patients (>100) with consistently positive outcomes for the indication.
Several clinical trials (> 2) randomized controlled with double blind, and including a significant number of patients (>100) with positive outcomes for the indication.
One or more randomized studies or multiple cohorts or epidemiological studies with positive outcomes for the indication.
Clinical studies exist but are uncontrolled, with conclusions that may be positive or contradictory.
Lack of clinical studies to date that can demonstrate the indication.


Child development
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The use of 2'-Fucosyllactose in infant nutrition is crucial for optimal infant development. By consuming it, babies benefit from a natural prebiotic that promotes the growth of good bacteria in their gut. This can help reduce digestive problems, colic, and intestinal infections in infants. Additionally, it has been demonstrated that 2'-Fucosyllactose also improves infant immune health, thus enhancing their resistance to infections.

Posologie

posologieOral

posologie1.2 g/L

formulationPowder


Digestive issues
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It has been reported that 2'-Fucosyllactose can significantly reduce the incidence of diarrhea in breastfed infants. In addition, infants breastfed with milk containing 2-FL have larger populations of bifidobacteria compared to infants fed milk lacking 2-FL. In adults, this prebiotic helps support a healthy and balanced intestinal flora, which improves digestion, nutrient absorption, and strengthens the immune system.

Posologie

posologieOral

posologie0.75 g

formulationPowder


Intestinal permeability
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2'-Fucosyllactose (2'-FL) acts on intestinal permeability control mainly in two ways. Firstly, 2'-FL has the ability to inhibit pathogen attachment to the intestinal wall. By binding to pathogen receptors, 2'-FL prevents their adhesion to intestinal epithelial cells, thus reducing the risk of lesions and inflammation. Secondly, 2'-FL stimulates the production of factors that strengthen the intestinal barrier. Bifidobacteria, favored by 2'-FL, can reinforce the intestinal barrier by improving the integrity of tight junctions between intestinal epithelial cells.

Posologie

posologieOral

posologie0.75 g

formulationPowder


Properties


Digestive effect

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2-FL is one of the simplest fucosylated oligosaccharides that meets all criteria and acts as a prebiotic to selectively stimulate the growth of beneficial bacteria. A prebiotic is defined as a non-digestible food ingredient that has a beneficial effect on the host by selectively stimulating the growth and/or activity of one or a limited number of bacteria in the colon, thereby improving host health.

Usages associés

Digestive issues, Intestinal permeability

Antimicrobial

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Several studies have shown the anti-adhesive and antimicrobial effect of fucosylated oligosaccharides. Indeed, fucosylated oligosaccharides inhibit Campylobacter jejuni adhesion to the H(O) blood group epitope and reduce the risk of infection. a0 2-FL also acts as an antifungal modulator and inhibits Candida albicans adhesion to human oral epithelial cells. Recent studies have shown that higher consumption of a-1-2 fucosylated oligosaccharides results in lower mortality among infants infected or exposed to HIV.


Immunomodulatory

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Human milk oligosaccharides modify the infant gut microbial environment. In vitro studies show they directly modulate immune responses. A study involving over 400 infants shows that formulas containing 2-fucosyllactose increase the ratio of activated CD8+ T cells, reduce inflammatory cytokine production, and boost immune development in infants.

Usages associés

Child development

Neurological

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Research on rats has revealed that oral supplementation with 2'-FL promotes brain development in both young and adult rats. In the 1990s, it was discovered that 2'-FL amplifies long-term potentiation in the hippocampus, a phenomenon characterized by strengthened synaptic strength following high-frequency stimulation. However, further studies are needed to confirm the role of 2'-FL in enhancing the cognitive abilities of breastfed infants.

Usages associés

Child development


Safety dosage

Infant: 1.2 g/L

The American Food and Drug Administration has recognized 2'-Fucosyllactose (2'-FL) as safe. In the European Union, 2'-FL is classified as a novel food. The European Food Safety Authority (EFSA) assessed 2'-FL on June 29, 2015, and concluded that 2'-FL is safe for infants (up to one year old) when added to infant formulas, in combination with Lacto-N-neotetraose (LNnT), at concentrations of up to 1.2 g/L of 2'-FL and up to 0.6 g/L of LNnT, following a 2:1 ratio in reconstituted formulas. 2'-FL is also safe for young children (over one year old) when used in toddler formulas, up to 1.2 g/L of 2'-FL, alone or in combination with LNnT up to 0.6 g/L, also in a 2:1 ratio.

Adult: 0.75 g - 2.9 g

It can be safely used without exceeding the recommended daily dose.

Pregnant woman: 0.75 g - 2.9 g

It can be safely used without exceeding the recommended daily dose.

Breastfeeding woman: 0.75 g - 2.9 g

It can be safely used without exceeding the recommended daily dose.

Child: 1.2 g/L

The U.S. Food and Drug Administration has classified 2'-FL as safe. In the European Union, 2'-FL is considered a novel food. The European Food Safety Authority (EFSA) evaluated 2'-FL on June 29, 2015, based on scientific and technical information and reported that: 1 2'-FL is safe for infants (up to one year) when added to infant formula, in combination with LNnT, at concentrations up to 1.2 g/L of 2'-FL and up to 0.6 g/L of LNnT, in a 2:1 ratio in reconstituted formula. 2'-FL is safe for young children (over one year old) when added to young child formula, at concentrations up to 1.2 g/L of 2'-FL (alone or in combination with LNnT at concentrations up to 0.6 g/L, in a 2:1 ratio).