Why 5 Species and Not 500?
Large microbiome panels can produce hundreds of data points. More data sounds better. In practice, it often creates more confusion than clarity.The Gutsy panel was built around a different philosophy: identify the species with the most consistent, peer-reviewed evidence, and measure those specifically. Not everything the things that matter.
1. Akkermansia muciniphila – The Gut Lining Protector
Reference range: 1–5% of total gut microbiota. Akkermansia lives in the intestinal mucus layer and plays a unique role: it feeds on mucin while simultaneously stimulating the body to produce more of it, actively reinforcing the gut lining. It’s consistently associated with better metabolic health, lower inflammation, improved insulin sensitivity, and weight regulation. Its levels respond to diet, making it one of the few species that’s genuinely actionable.
2. Faecalibacterium prausnitzii – The Gold Standard Marker
Reference range: 5–10% of total gut microbiota prausnitzii is one of the most abundant and well-studied bacteria in the healthy gut. It’s a major producer of butyrate, which fuels colon cells, reduces inflammation, and supports gut barrier integrity. Low levels are a consistent feature in patients with IBD, IBS, metabolic syndrome, depression, and obesity. Its absence is widely considered a hallmark of dysbiosis.
3. Roseburia intestinalis – The Anti-Inflammatory Workhorse
Reference range: 2–15% of total gut microbiota Roseburia is another major butyrate producer. It’s associated with maintaining mucosal health, reducing gut permeability, and supporting T-regulatory cell function the immune cells responsible for keeping inflammation in check. Low levels have been found consistently in patients with inflammatory bowel disease, type 2 diabetes, and neurological conditions.
4. Bifidobacterium adolescentis – The Mood and Energy Species
Reference range: 0.5–5% of total gut microbiota Bifidobacterium breaks down complex carbohydrates and dietary fiber, converting them into short-chain fatty acids. It also supports the production of GABA and serotonin through the gut-brain axis. Low levels are correlated with mood disorders, IBS, and poor response to high-fiber dietary interventions.
5. Ruminococcus gnavus – The Double-Edged Species
Reference range: 0–1% of total gut microbiota gnavus is naturally present and beneficial in small amounts. When elevated, however, certain strains produce inflammatory exopolysaccharides that activate immune cells and increase gut permeability. This is the one species in the panel where elevated levels are the concern not deficiency.
Together, These 5 Tell a Story
No single species is the whole picture. But together, these five provide a clinically useful snapshot of how the gut is functioning from barrier integrity to immune balance to metabolic health to mood. One test. 72 hours. A plain-language report designed for real clinical conversations.