The Intersection of Cognitive, Gut, and Metabolic Health: Context from a Published Case Report

The plan included nutritional supplementation, digestive support, physical rehabilitation, and other interventions.*

Digestive health can influence many areas of overall well-being, including brain health.* The digestive system and brain communicate through several pathways, often called the gut-brain axis. A healthy intestinal barrier is one part of this connection.* In the published case, digestive testing helped guide a nutritional plan that included several forms of gut lining support and intestinal barrier support.*

The plan included L-glutamine, N-acetyl-D-glucosamine, zinc carnosine, serum-derived immunoglobulins, and tributyrin. The case report describes zinc carnosine as supporting the gastrointestinal lining and serum-derived immunoglobulins as supporting mucosal barrier function.* Tributyrin provides butyrate, a short-chain fatty acid that provides energy for cells in the colon and helps support normal intestinal barrier function.*

A healthy gut depends in part on maintaining a balanced community of microorganisms.* As part of the digestive health phase of this man’s plan, his health-care team included botanical ingredients to support healthy microbial balance.* The case report describes these ingredients in the context of supporting a healthy intestinal environment.*

Metabolic health was another focus of the man’s nutritional plan because he had experienced weight gain and other concerns related to metabolic function. During the digestive health phase, his health-care team included berberine and alpha-lipoic acid. Berberine supports healthy glucose and insulin metabolism already within the normal range, while alpha-lipoic acid supports normal glucose metabolism and mitochondrial energy production in healthy individuals.*

These ingredients were part of the man’s broader multimodal plan, so the case report cannot determine their individual contribution.

As the man’s nutritional plan evolved, his health-care team added an omega 3 supplement containing eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). EPA and DHA are omega-3 fatty acids that are important components of cell membranes throughout the body.* DHA is especially abundant in the brain and helps support normal brain structure and function, while EPA helps support a healthy inflammatory response.* Both EPA and DHA also support cardiovascular health.*

Because the case involved several nutritional and non-nutritional interventions, the report cannot determine the individual contribution of omega-3 supplementation.

As the health-care team continued to evaluate this man’s nutritional needs, testing informed the team’s individualized approach to B-vitamin and methylation support. Methylation is a normal process involved in many everyday functions, including making neurotransmitters, the chemical messengers used by the brain and nervous system. It also helps process homocysteine, an amino acid found in the blood. Folate and vitamins B12 and B6 are important methylation nutrients that support normal methylation and homocysteine metabolism.*

The man’s later nutritional plan included targeted B-vitamin and methylation support based on these findings.*

This man’s nutritional plan also included support for several other areas of health. Collagen peptides provided amino acids that support connective tissue health, while other supplements included ingredients selected to support normal liver function and a healthy stress response.* These additions reflected the broad, individualized nature of his nutritional plan.

Because these supplements were part of a complex multimodal plan, the case report does not establish the individual contribution of any one supplement.

The published report describes a 50-year-old former NFL lineman with more than a decade of professional play and a history of repeated head impacts. The case followed his care for about two years, from March 2023 through March 2025. His health-care team used several types of testing throughout this period, including cognitive, laboratory, digestive, metabolic, genetic, body composition, and quantitative electroencephalography (qEEG) assessments.

His individualized plan evolved over multiple phases and included physical rehabilitation, dietary strategies, gut-focused interventions, nutritional supplements, and other professionally guided interventions. His health-care team continued testing and adjusted the plan as the case progressed.

The report is a narrative account of one person’s professionally guided multimodal wellness plan. It describes the experience of only one person. It cannot show cause and effect, cannot tell us whether other people would have the same experience, and it should not be used as a supplementation plan.