Tempeh
Overview
Tempeh is fermented soy providing live probiotics, enhanced nutrient bioavailability, and isoflavones, supporting gut health and neurotransmitter synthesis. Fermented Foods: Sauerkraut, kimchi, kefir, miso, kombucha, tempeh provide live microbes + postbiotic peptides; improved SCFA pools; vagal signaling. Tempeh: Fermented soybeans, high in protein and probiotics. Fermentation improves digestibility and nutrient bioavailability.
Recipes
Substances
18 substances in this food
Calcium
Bone health; neurotransmission; interacts with vitamin D and K2
Choline
Acetylcholine precursor; methyl donor; phospholipid synthesis for membranes
Copper
Cofactor in redox enzymes; dopamine β-hydroxylase; iron metabolism interplay
Genistein
Soy isoflavone; ECS modulation via FAAH inhibition; anti-inflammatory/neuroprotective
Histidine
Essential AA; precursor to histamine; roles in enzyme active sites
Iron
Oxygen transport; dopamine synthesis (tyrosine hydroxylase cofactor)
Isoleucine
Essential BCAA; energy metabolism; complements leucine/valine
Leucine
Essential BCAA; mTOR signaling; protein synthesis; cognitive load support
Linoleic Acid (LA, n-6)
Essential omega-6; precursor to arachidonic acid and eicosanoids
Lysine
Essential AA; limiting in many cereals; complements legumes
Magnesium
Enzymatic cofactor (>300 reactions); neurotransmitters; mitochondria; redox balance
Manganese
Cofactor for MnSOD (SOD2); mitochondrial antioxidant defense
Methionine
Essential AA; precursor to SAMe via methylation cycle
Phenylalanine
Essential AA; precursor to tyrosine → catecholamines
Threonine
Essential AA; structural proteins; mucin production
Tryptophan
Serotonin/melatonin precursor; NAD+ pathway substrate; LAT1 transport dynamics
Tyrosine
Dopamine and norepinephrine precursor; LAT1 competition with LNAAs
Valine
Essential BCAA; supports protein balance and neurotransmitter transport competition
Preparation Notes
- Fermentation improves digestibility and nutrient bioavailability; lactic acid bacteria acidify the medium, activating microbial and endogenous phytases, while also increasing B-vitamin levels
- Can be cooked various ways; gentle cooking preserves probiotics
- Part of fermented foods rotation; fermented foods provide live microbes + postbiotic peptides; improved SCFA pools; vagal signaling
- Supports gut microbiome diversity; dietary diversity (≥30 plant foods per week) supports microbial richness and resilience
Biological Target Matrix
| Biological Target | Substance | Contribution Level | Therapeutic Areas | Mechanism of Action |
|---|---|---|---|---|
| Gut–Brain Axis & Enteric Nervous System (ENS) | Choline | Contextual / minor contributor | Choline is metabolised by gut bacteria; some strains (e.g. Lactobacillus) can produce acetylcholine. Microbial choline metabolism (e.g. trimethylamine) shows inter-individual variability and may influence host metabolism and gut–brain signalling. | |
| Gut–Brain Axis & Enteric Nervous System (ENS) | Genistein | Contextual / minor contributor | — | |
| Inflammation & Oxidative Stress | Choline | Contextual / minor contributor | Choline-derived betaine supports homocysteine remethylation; elevated homocysteine is linked to oxidative stress and inflammatory signalling. Phosphatidylcholine supports membrane integrity and cell signalling in immune and redox contexts. | |
| Inflammation & Oxidative Stress | Copper | Contextual / minor contributor | Participates in redox enzymes and antioxidant networks | |
| Inflammation & Oxidative Stress | Genistein | Contextual / minor contributor | Anti-inflammatory and anti-neuroinflammatory properties; reduces neuroinflammation | |
| Inflammation & Oxidative Stress | Linoleic Acid (LA, n-6) | Contextual / minor contributor | Essential omega-6 fatty acid; precursor to arachidonic acid and eicosanoids; excessive n-6:n-3 ratios may skew toward pro-inflammatory eicosanoids | |
| Metabolic & Neuroendocrine Stress (HPA Axis & ANS) | Choline | Contextual / minor contributor | Choline supports hepatic VLDL assembly and lipid export; methyl donors (choline, betaine) may influence adenosine metabolism and HPA axis activity. Adequate choline status supports metabolic stability and stress physiology. | |
| Metabolic & Neuroendocrine Stress (HPA Axis & ANS) | Genistein | Contextual / minor contributor | — | |
| Metabolic & Neuroendocrine Stress (HPA Axis & ANS) | Magnesium | Contextual / minor contributor | Helps manage stress responses; combined with vitamin D reduced behavioral problems; synergy with zinc and omega-3s reported | |
| Methylation & One-Carbon Metabolism | Choline | Contextual / minor contributor | Precursor to trimethylglycine (TMG/betaine), a dietary methyl donor that helps recycle homocysteine to methionine via an alternative pathway; supports one-carbon metabolism alongside folate, riboflavin, and B12; influences methylation dynamics relevant to MTHFR and COMT activity | |
| Methylation & One-Carbon Metabolism | Genistein | Contextual / minor contributor | — | |
| Methylation & One-Carbon Metabolism | Methionine | Contextual / minor contributor | Essential amino acid that forms S-adenosylmethionine (SAMe), the universal methyl donor for neurotransmitter synthesis and membrane phospholipid methylation | |
| Mitochondrial Function & Bioenergetics | Choline | Contextual / minor contributor | Phosphatidylcholine and other choline-containing phospholipids support mitochondrial membrane integrity and energy metabolism; choline-derived betaine contributes to one-carbon status that can influence mitochondrial resilience | |
| Mitochondrial Function & Bioenergetics | Genistein | Contextual / minor contributor | — | |
| Mitochondrial Function & Bioenergetics | Iron | Contextual / minor contributor | Critical for oxygen delivery to the brain via hemoglobin; supports mitochondrial function and energy production | |
| Mitochondrial Function & Bioenergetics | Magnesium | Contextual / minor contributor | Supports enzymes involved in glycolysis and the Krebs cycle (processes that generate ATP from glucose); binds to ATP and all triphosphates in cells to activate them | |
| Mitochondrial Function & Bioenergetics | Manganese | Contextual / minor contributor | Supports mitochondrial antioxidant defense through MnSOD activity | |
| Neurotransmitter Regulation | Calcium | Contextual / minor contributor | Essential for nerve impulse transmission and neurotransmission | |
| Neurotransmitter Regulation | Choline | Contextual / minor contributor | Essential precursor for acetylcholine synthesis, supporting memory, learning, and neuroplasticity; supports membrane phospholipid biosynthesis (PC) which is critical for membrane fluidity and neurotransmitter receptor function; phospholipid methylation (PLM) alters membrane structure, facilitating faster neuronal recovery and influencing ion channel behavior in gamma oscillations linked to attention and cognition | |
| Neurotransmitter Regulation | Copper | Contextual / minor contributor | Cofactor in dopamine β-hydroxylase, supporting catecholamine synthesis; supports norepinephrine synthesis | |
| Neurotransmitter Regulation | Genistein | Contextual / minor contributor | Enhances endocannabinoid activity; modulates dopamine, glutamate, and GABA signaling pathways | |
| Neurotransmitter Regulation | Iron | Contextual / minor contributor | Essential cofactor for tyrosine hydroxylase, the rate-limiting enzyme in the conversion of tyrosine to dopamine; critical for catecholamine synthesis | |
| Neurotransmitter Regulation | Magnesium | Contextual / minor contributor | Broad cofactor for neurotransmitter synthesis and receptor modulation (e.g., NMDA, GABA); functions as an NMDA receptor antagonist and GABA receptor modulator; assists enzymes involved in synthesis of dopamine and serotonin | |
| Neurotransmitter Regulation | Phenylalanine | Contextual / minor contributor | Essential amino acid that converts to tyrosine and supports catecholamine synthesis (dopamine, norepinephrine); participates in LAT1 competition at the blood-brain barrier | |
| Neurotransmitter Regulation | Tryptophan | Contextual / minor contributor | Precursor for serotonin and melatonin; brain entry competes at LAT1 with other large neutral amino acids (LNAAs); carbohydrate-rich, low-protein meals raise the plasma tryptophan:LNAA ratio because insulin pushes competing LNAAs out to muscles; can feed NAD+ synthesis via the kynurenine pathway | |
| Neurotransmitter Regulation | Tyrosine | Contextual / minor contributor | Catecholamine precursor (dopamine, norepinephrine); brain transport via LAT1 competes with other LNAAs; iron is an essential cofactor for tyrosine hydroxylase, the rate-limiting enzyme in conversion of tyrosine to dopamine; cofactors include iron, B6, folate, omega-3s, and BH₄ (tetrahydrobiopterin) to support rate-limiting steps in catecholamine synthesis |
References
- Fermented Foods: Sauerkraut, kimchi, kefir, miso, kombucha - Live microbes + postbiotic peptides; improved SCFA pools; vagal signaling
- Tempeh: Fermented soybeans, high in protein and probiotics
- Part of fermented foods strategy; fermentation goes further: lactic acid bacteria acidify the medium, activating microbial and endogenous phytases, while also increasing B-vitamin levels LeBlanc et al. 2011
- Fermentation produces beneficial organic acids and partially pre-digests starch and protein—improving both digestibility and glycaemic response
- Genistein, a soy-derived isoflavonoid, has shown potential as a modulator of several biochemical pathways, including the endocannabinoid system and neuroinflammation