(2,6) CARNITINE: Healthy function of the brain & nerves Carnitine supports the transport of fatty acids into mitochondria (the tiny powerhouses in every cell), boosting ATP production

Other studies find that it also supports dopamine production by upregulating dopamine receptors.[6] Animal studies find that l-carntine increases synaptic neurotransmission in the brain and consequently improves learning capacity.[7] It even helps clean up waste metabolites in the brain that can lead to cognitive decline, including amyloid-beta plaques.[8] Supports Healthy Blood Glucose and Insulin Levels L-carnitine may reduce insulin resistance by removing harmful lipids from cells, mending cell membranes, and reducing accumulated acyl CoA derivatives and/or their metabolites.[3,9] It has also been found to reducing fasting blood glucose levels and HbA1c (a long term marker of cardiometabolic health).[10] Supports a Healthy Mood Not only can carnitine benefit cognitive performance and long-term brain health, it may also be able to improve mood and support mental health

Taken together, metabolomic studies of long COVID, ME/CFS, and MDD show considerable similarities in the overall metabolic profiles associated with a disruption of energy production and an imbalance of potentially neuroprotective and detrimental metabolites, i.e., a deficiency of neuroprotective metabolites such as acetylcarnitine
You eat a lot of fiber, and you select for fiber-consuming bacteria