Many patients experience persistent "brain fog" after a stroke, concussion, ICU admission or COVID-19. Memory loss, difficulty concentrating, fatigue and anxiety symptoms are real, but often not explainable by MRI or standard blood tests.

Multi-omics makes the invisible visible: the subtle dialogue between microbiome, immune system and brain that determines whether cognitive recovery succeeds or symptoms persist.

The clinical problem

• Up to 46% of ICU patients develop cognitive residual symptoms, including brain fog and memory problems.(Talkington et al., Frontiers in Neurology 2025)
• Lung COVID patients have 193% increased risk of ischemic stroke and cognitive impairment.(Talkington, 2025)
• SARS-CoV-2 spike protein and postviral immune activation cause long-term neuroinflammation and microbiome disruption.(de Melo et al., Viruses 2025)

Multi-omics insights into brain fog and cognitive symptoms

1. Gut-brain axis
   - Doenyas et al., Scientific Reports 2025: confirms that microbiome damage following SARS-CoV-2 infection contributes to "brain fog" via neurotransmitter imbalance and metabolites.
2. Neuroinflammation
   - Dos Reis et al., Wiley 2024: described how neuroimmune crosstalk leads to persistent brain inflammation in lung COVID and post-ICU patients.
3. Stress & microbiome
   - Beurel, Gut Microbes 2024: Stress disrupts the microbiome and increases the risk of anxiety and depression via pro-inflammatory signals.
4. Multi-omics mapping
   - Talkington et al., 2025: multi-omics can distinguish which patients remain especially metabolic, inflammatory or cognitively vulnerable → personalized care.

Innovative solutions for the clinic

1. Cognitive Resilience Index
   - Integrates DNA (COMT, BDNF), microbiome diversity and metabolites to quantify cognitive resilience.
2. Neuroinflammation profiles
   - Metabolite analysis detects immune activation (e.g. IL-6, kynurenine pathway) that maintains brain fog.
3. Tryptophan pathways monitor
   - Serotonin pathway = focus and sleep recovery; kynurenine pathway = fatigue and depression.
4. Brain-gut crosstalk mapping
   - Visualizes the role of gut bacteria in memory and mood, useful in PTSD, depression and lung COVID.

Why My InnerSelfie is unique

• Multi-omics integration: DNA, metabolites and microbiome in a single clinical profile.
• Crosstalk focus: we show how gut-brain communication affects cognitive recovery.
• Preventive precision: risks of brain fog or neuroinflammation are revealed early.
• Additional tool for the physician: decisions remain in the hands of neurologist or psychiatrist; we provide additional evidence.
• Tomorrow's care: innovative, preventive and always customized. Innovation of today becomes the standard of tomorrow - substantiated, safe, risk-free.

Key insights

• Brain fog is often biologically explainable via gut-brain crosstalk and neuroinflammation.
• Multi-omics studies show marked immune activation and microbiome disruption in lung COVID, post-ICU and dementia.
• My InnerSelfie provides physicians with objective biomarkers to understand and monitor cognitive symptoms.

Scientific references

• Talkington GMG. Common gut-brain mechanisms of vascular dementia and neurological sequelae of SARS-CoV-2. ProQuest. 2025.
• Talkington GMG, Kolluru P, Gressett TE. Neurological sequelae of long COVID: review of mechanisms and imaging. Front Neurol. 2025.
• de Melo BP, da Silva JAM, Rodrigues MA, et al. SARS-CoV-2 spike protein and long COVID mechanisms. Viruses. 2025.
• Doenyas C, Clarke G, Cserjési R. Gut-brain axis and neuropsychiatric health. Sci Rep. 2025.
• Dos Reis RS, Selvam S, et al. Neuroinflammation in post-COVID sequelae: neuroimmune crosstalk. Wiley. 2024.
• Beurel E. Stress in the microbiome-immune crosstalk. Gut Microbes. 2024.
• Jurek JM, Castro-Marrero J. Gut microbiome disturbances in ME/CFS. Nutrients. 2024.