Brain
Focus, mood, neurotransmitters
The brain is roughly 60% fat by dry weight and the single most metabolically expensive organ you own. Omega-3 DHA builds the neuronal membranes that all signaling depends on; choline becomes acetylcholine (memory + attention) as well as the phosphatidylcholine those membranes are made of; and the B-vitamins + iron run neurotransmitter synthesis and the energy supply neurons need to fire. Shortfalls tend to surface first as the soft symptoms — brain fog, low mood, poor focus — long before anything shows up structurally.
How your supplements + diet cover this system right now — the nutrients feeding it, where the gaps are, and your own lab readouts.
The load-bearing nutrients — if these are deficient, this system shows symptoms first. Click any to see daily targets, top food sources, and supplements that supply it.
Lab markers that report on this system’s health.
Save a lab session under My Journey → Biomarkers to see your own values for these.
Where the biochemistry happens for this system.
DNA methylation, homocysteine clearance, methyl-donor supply
Krebs cycle + electron transport — ATP production
Hydroxyapatite formation, osteoblast cofactors
Dopamine, serotonin, GABA precursors + B6/iron cofactors
Heme synthesis, erythropoiesis, oxygen carrying capacity
eNOS → nitric oxide, vasodilation, endothelial function
Cortisol synthesis, adrenal cofactor supply, calming neurochemistry
Systems that share a load-bearing nutrient with this one.