What is behind Anxiety & Mood
Not happiness — stability, and the whole positive dimension of how life feels. The finding that changes how to read this pathway: feeling good is not simply the absence of feeling bad. When researchers statistically removed depression and anxiety from the analysis, the health benefits of positive wellbeing were still there — they are independent dimensions, not two ends of one line. That is why mood runs outward to sleep, inflammation, glucose, wound healing, infection resistance and survival itself, and not only inward from them. Evidence A — Human trial evidence.
The hypothalamic–pituitary–adrenal axis and its hormone cortisol — the body's central stress-and-recovery command. Evidence A — Human trial evidence.
GABA — the brain's principal inhibitory neurotransmitter, the source of calm and restful sleep. Evidence A — Human trial evidence.
Serotonin — the neurotransmitter of mood and satiety, and the precursor the body converts to melatonin for sleep. Evidence A — Human trial evidence.
Insulin-like growth factor-1 — the dermal-papilla growth factor that drives follicle proliferation and prolongs anagen (the active growth phase). Evidence A — Human trial evidence.
The master inflammatory switch — indispensable to defend against threat, corrosive when it never stands down. Evidence B — Preclinical.
The cystine–glutamate exchange that supplies antioxidant building blocks while tuning excitatory neurotransmission. Evidence A — Human trial evidence.
The chemistry of wanting, not of liking. Dopamine sets how much effort a goal feels worth — which is why its loss reads as apathy long before it reads as sadness. More is not better: the same system that drives pursuit drives compulsion. Evidence A — Human trial evidence.
Endocannabinoid signaling — the tone-setting system that buffers stress, mood and homeostasis. Evidence B — Preclinical.
The alternative fate of tryptophan — away from serotonin and toward NAD+ and neuroactive metabolites. Also carries the IDO enzyme step, which is what inflammation induces. Evidence A — Human trial evidence.
A sensor of cellular stress that ignites inflammation driven by damage rather than by germs. Evidence A — Human trial evidence.
The intestinal barrier — the selective wall that admits nutrients, excludes toxins and anchors the gut–brain and immune dialogue.
Evidence on these pathways
Dopamine → Melatonin. “Through α1B-D4 and β1-D4 receptor heteromers dopamine inhibits adrenergic receptor signaling and blocks the synthesis of melatonin induced by adrenergic receptor ligands.” — Circadian-Related Heteromerization of Adrenergic and Dopamine D4 Receptors Modulates Melatonin Synthesis and Release in the Pineal Gland. PLoS Biology, 2012, volume 10, e1001347. doi:10.1371/journal.pbio.1001347
Dopamine → Mood (Positive Affect). “Boosting dopamine also increased happiness resulting from some rewards.” — Dopaminergic Modulation of Decision Making and Subjective Well-Being. Journal of Neuroscience, 2015, 35(27), 9811-9822. doi:10.1523/JNEUROSCI.0702-15.2015 | PMC4495239
GABA → Mood (Positive Affect). “In this review, we summarize clinical and preclinical evidence supporting a central and causal role of GABAergic deficits in the etiology of depressive disorders.” — The GABAergic deficit hypothesis of major depressive disorder. Molecular Psychiatry, 2011, vol 16, issue 4, pp 383-406. doi:10.1038/mp.2010.120
Intestinal Barrier → Ammonia. “This weakens the paracellular seal of the intestinal epithelium, enabling microbial products such as endotoxins, ammonia, and even whole microorganisms to translocate into the portal circulation.” — How the gut-liver axis shapes hepatic encephalopathy: mechanistic and therapeutic perspectives. Exploration of Digestive Diseases 2025;4:100597. doi:10.37349/edd.2025.100597 (no PMID exists — the journal is not MEDLINE-indexed; absence confirmed on file, not derived)
Formulas that act on these pathways
Acts on 9 of these pathways: Mood (Positive Affect), HPA Axis / Cortisol, GABA, Serotonin, NF-κB, Cystine–Glutamate Antiporter, Dopamine, Endocannabinoid Signaling, Kynurenine Pathway.
Acts on 8 of these pathways: Mood (Positive Affect), HPA Axis / Cortisol, GABA, Serotonin, NF-κB, Cystine–Glutamate Antiporter, Dopamine, Intestinal Barrier.
Acts on 6 of these pathways: HPA Axis / Cortisol, GABA, Serotonin, NF-κB, Cystine–Glutamate Antiporter, Dopamine.
Acts on 5 of these pathways: HPA Axis / Cortisol, Serotonin, NF-κB, Cystine–Glutamate Antiporter, Intestinal Barrier.
Acts on 5 of these pathways: HPA Axis / Cortisol, Serotonin, NF-κB, Dopamine, Intestinal Barrier.
Acts on 5 of these pathways: HPA Axis / Cortisol, Serotonin, NF-κB, Cystine–Glutamate Antiporter, Intestinal Barrier.
What this page does not claim
This page names the pathways involved and the published evidence on each. It does not claim that any formula treats, cures or prevents Anxiety & Mood. A pathway opens here only on graded, published evidence, under a standard fixed before the evidence was gathered, and every figure above carries its grade.
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.