Quatrefolic®

## Rethinking Folate: The Evolution of Vitamin B9 For decades, public health initiatives have relied on synthetic folic acid to fortify foods and prevent severe birth defects. While this approach successfully reduced the incidence of neural tube defects globally, modern nutritional science has uncovered a significant flaw: folic acid is not the form of vitamin B9 the human body actually uses.

Both synthetic folic acid and naturally occurring food folates are biologically inactive. To be utilized by the body, they must undergo a complex, four-step enzymatic conversion process in the liver and intestines to become (6S)-5-methyltetrahydrofolate (5-MTHF).

This is where Quatrefolic® changes the paradigm. Quatrefolic® is a patented, highly bioavailable glucosamine salt of 5-MTHF. It provides the body with the exact, biologically active form of folate it needs, bypassing the complex metabolic bottlenecks that hinder millions of people.

## The MTHFR Gene Mutation: Why Folic Acid Fails Many The rationale behind supplementing with pre-methylated folate like Quatrefolic® stems from a widespread genetic anomaly. The final step in converting folic acid to active 5-MTHF is governed by an enzyme called methylenetetrahydrofolate reductase (MTHFR).

Research indicates that a massive portion of the global population—up to 40% to 60% in some demographics—possesses polymorphic variants of the MTHFR gene (most commonly the C677T and A1298C mutations). These genetic variations result in a structurally altered MTHFR enzyme that operates at a severely reduced capacity. For these individuals, consuming synthetic folic acid is highly inefficient. Worse, unmetabolized folic acid (UMFA) can build up in the bloodstream, potentially causing adverse health effects and competing with active folate for cellular receptor sites.

Quatrefolic® completely bypasses the MTHFR enzyme. By delivering the finished, bioactive 5-MTHF molecule, it ensures that the body receives the full benefits of the nutrient, regardless of a person's genetic makeup.

## Cardiovascular Health and Homocysteine Control Beyond fetal development, one of the most critical roles of active folate is the regulation of homocysteine. Homocysteine is a naturally occurring amino acid produced during metabolism. However, elevated levels of homocysteine (hyperhomocysteinemia) are highly toxic to blood vessels and are recognized as an independent risk factor for cardiovascular disease, stroke, and cognitive decline.

5-MTHF is the primary methyl donor in the body's methionine cycle. It works synergistically with Vitamin B12 to remethylate homocysteine, converting it back into the beneficial amino acid methionine.

Clinical research highlights the superiority of Quatrefolic® in this arena. In a 2016 multicenter, randomized clinical trial, researchers compared the effects of 400 mcg of Quatrefolic® (plus Vitamin B6) against a massive 5 mg (5000 mcg) dose of synthetic folic acid in hypertensive subjects. Despite the folic acid dose being more than ten times higher, the Quatrefolic® group experienced a significant reduction in homocysteine levels, with nearly 56% of participants achieving ideal homocysteine status. This underscores that when it comes to folate, biological form is far more important than sheer dosage.

## Pregnancy and Fetal Development Folate is arguably the most critical nutrient during the early stages of pregnancy. It is fundamentally involved in DNA synthesis and cell division—processes that occur at an explosive rate during fetal development.

Adequate folate levels are required to ensure the proper closure of the neural tube, which forms the baby's brain and spinal cord. Because the neural tube closes between 28 to 32 days after conception—often before a woman even realizes she is pregnant—the CDC recommends that all women capable of becoming pregnant consume at least 400 mcg of folate daily.

For pregnant women, particularly those with MTHFR mutations, Quatrefolic® provides peace of mind. Supplementing with 5-MTHF provides an immediate, reliable source of active folate, minimizing the risk of developmental problems like spina bifida, anencephaly, and cleft palate without the risk of unmetabolized folic acid buildup.

## Brain Health, Mood, and Neurotransmitters Folate deficiency doesn't just affect the blood and the heart; it profoundly impacts the brain. Symptoms of folate deficiency often manifest neurologically as fatigue, irritability, insomnia, depression, and cognitive decline.

Unlike synthetic folic acid, 5-MTHF efficiently crosses the blood-brain barrier. Once inside the central nervous system, it plays a vital role in the synthesis of tetrahydrobiopterin (BH4). BH4 is a mandatory cofactor for the production of monoamine neurotransmitters. Without adequate 5-MTHF, the brain cannot efficiently produce serotonin (the "feel-good" neurotransmitter), dopamine (the "motivation" neurotransmitter), or melatonin (the sleep hormone).

By supporting healthy methylation and neurotransmitter synthesis, Quatrefolic® promotes mental clarity, emotional resilience, and optimal brain energy.

## Quatrefolic® vs. Older Forms of 5-MTHF While 5-MTHF supplements have existed for some time, early iterations were bound to a calcium salt (often seen on labels as Calcium L-Methylfolate). While effective, calcium salts have limited solubility in water.

Gnosis by Lesaffre revolutionized this by binding 5-MTHF to a glucosamine salt to create Quatrefolic®. This unique structural change dramatically increases the ingredient's water solubility. Because the human digestive tract is an aqueous environment, higher water solubility directly translates to improved mucosal absorption, greater stability, and ultimately, higher bioavailability.

## Dosage and Safety The standard clinical dose for Quatrefolic® ranges from 400 mcg to 1000 mcg (1 mg) daily, which aligns with the FDA and CDC recommendations for preventing folate deficiency and supporting pregnancy. In therapeutic settings, such as treating severe hyperhomocysteinemia or supporting psychiatric medications, practitioners may recommend higher doses.

Quatrefolic® is exceptionally safe and well-tolerated. Because it is a water-soluble vitamin, the body easily excretes excess amounts. However, it is crucial to ensure adequate Vitamin B12 intake when supplementing with high doses of folate, as the two nutrients work hand-in-hand in the methylation cycle.