Trials using around 1,200mg/day in divided doses showed modest but consistent improvements in memory and executive function among patients with mild cognitive impairment, Alzheimers, or post-stroke deficits.32 Some reviews also note benefits for mood symptoms (apathy, anxiety) alongside cognition.32 For healthy individuals, the benefits are more nuanced

Nervous system disorders Uncommon: Headache Not known: Convulsions*, Dizziness Heart disease Not known: Palpitations Vascular pathologies Uncommon: Hypertension, Hypotension Respiratory, thoracic and mediastinal pathologies Not known: Dyspnea Gastrointestinal disorders Common: Vomiting, Nausea, Diarrhea, Abdominal pain Uncommon: Dysgeusia, Dyspepsia, Dry mouth Skin and subcutaneous tissue disorders Uncommon: Abnormal skin odor ** Not known: Itching, Skin rash Musculoskeletal and connective tissue disorders Uncommon: Muscle spasms Not known: Myasthenia***, Muscle tension Systemic disorders and conditions related to the administration site Uncommon: Chest pain, Feeling abnormal, Pyrexia, Injection site reaction**** Diagnostic tests Uncommon: Increased blood pressure Very rare: Increased INR*****
And the answer has a bit of nuance
We find that with severe cell stress indicated by elevated circulating N -formylmethionine, a shared metabolic shift exists in both the VITdAL-ICU and RoCI cohorts despite clinical heterogeneity