Vitamin B9 (Folate)

This marker assesses the genetic capacity of your microbiome to synthesize Vitamin B9 (Folate). Folate is an essential molecule for creating new DNA, repairing cells, and controlling the expression of your genes. Unlike other bacterial vitamins that are only consumed locally, a significant portion of the folate produced in the large intestine is indeed absorbed by your body, turning your flora into a true factory for continuous internal supplementation.

Traditionally, it was thought that all the folate (or folic acid) we needed came exclusively from the green leaves in our diet. However, recent science has discovered that the human colon is equipped with special transporters specifically designed to absorb folate manufactured by bacteria.

Within your ecosystem, folate production is a team effort. Some bacteria can build the molecule from scratch, while others need chemical "pieces" passed to them by their neighbors. When you have a diverse and rich microbiome of folatogenic (B9-producing) bacteria, you ensure a constant trickle of this vital vitamin directly into your bloodstream, protecting you from systemic deficiencies even if your diet occasionally falters.

The endogenous production of folate has a systemic, cardiovascular, and profoundly epigenetic impact:

• Epigenetics and Methylation: Folate is the primary donor of "methyl" groups in your body. These groups act as physical switches that turn your genes on or off. A good level of bacterial folate ensures that your "longevity genes" are turned on and "pro-inflammatory genes" remain off.
• Cardiovascular and Brain Health: Folate works closely with Vitamin B12 to neutralize homocysteine, a waste amino acid that, if it accumulates, is toxic to the arteries and brain. Keeping homocysteine low thanks to this folate is crucial for preventing atherosclerosis, heart attacks, and cognitive decline.
• Cellular Regeneration (Mucosa and Skin): Your gut, your skin, and your hair are fast-turnover tissues. They need constant folate to create new, healthy cells. B9-producing bacteria directly nourish colon cells, accelerating the healing of micro-ulcers and keeping the intestinal wall strong.

The evaluation of folate biosynthesis is performed through Shotgun metagenomics, quantifying the overall genetic potential for the tetrahydrofolate synthesis pathway. Our bioinformatic algorithm tracks and maps the abundance of key genes and operons of the folate biosynthesis superpathway, and specific genes such as folA, folP, folC.

In the human intestinal ecosystem, the ability to produce folate de novo is relatively well-conserved across certain phyla. Highly efficient producers include specific strains of the genus Bifidobacterium (particularly B. adolescentis and B. pseudocatenulatum), as well as multiple species of Bacteroides and Lactobacillus (e.g., L. plantarum).

A high capacity indicates your microbiome is a robust endogenous source of folate. This actively supports systemic cellular methylation and reduces absolute dependence on daily vitamin intake. Conversely, a low capacity may signal functional deficits. Your body relies almost 100% on dietary folic acid or supplements. Clinical intervention requires drastically increasing the consumption of dark green leafy vegetables (spinach, Swiss chard) and reintroducing prebiotics (such as GOS) to selectively stimulate the growth of folate-producing Bifidobacteria and restore internal production.