Black Beans
Overview
Black beans provide plant protein, polyphenols, and prebiotic fiber. The paper details optimal soaking conditions (60°C, pH 6.0) for phytate reduction. Optimal conditions for the endogenous phytases of black beans is 60°C and pH 6.0, that resulted in a 55% reduction in 1P6 after soaking and cooking. Black beans are polyphenol-rich and support gut health, similar to kidney beans.
Recipes
Substances
18 substances in this food
Copper
Cofactor in redox enzymes; dopamine β-hydroxylase; iron metabolism interplay
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
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
Potassium
Electrolyte for nerve transmission, muscle function, and blood pressure regulation
Threonine
Essential AA; structural proteins; mucin production
Tryptophan
Serotonin/melatonin precursor; NAD+ pathway substrate; LAT1 transport dynamics
Valine
Essential BCAA; supports protein balance and neurotransmitter transport competition
Vitamin B1 (Thiamine)
Mitochondrial glucose metabolism; ATP synthesis; rapid turnover in CNS
Vitamin B6 (Pyridoxine → PLP)
PLP cofactor for neurotransmitter synthesis; relies on brain PDXK activation
Vitamin B9 (Folate; 5-MTHF)
One-carbon metabolism; methylation; homocysteine recycling
Zinc
Cofactor in neurotransmission and antioxidant enzymes; dopamine modulation
Preparation Notes
- Soak at 60°C (warm water) with pH 6.0 (lemon/vinegar) for optimal phytate reduction; optimal conditions for the endogenous phytases of black beans is 60°C and pH 6.0, that resulted in a 55% reduction in 1P6 after soaking and cooking
- Soak 12-24 hours, then cook thoroughly to reduce phytates and improve mineral bioavailability
- Pair with grains for complete amino acid profile; grain-legume complementarity improves essential amino-acid coverage
- Pair with vitamin C to enhance iron absorption, with studies showing up to a fourfold increase when consumed together Hallberg et al. 1989
- Soaking and sprouting reduces phytates in legumes/grains, improving non-heme iron and zinc bioavailability GREINER and KONIETZNY 1999
Biological Target Matrix
| Biological Target | Substance | Contribution Level | Therapeutic Areas | Mechanism of Action |
|---|---|---|---|---|
| Hormonal Response | Magnesium | Contextual / minor contributor | Supports calcium modulation along with vitamin D, taurine, phospholipids, and flavonoids; supports insulin sensitivity, sympathetic arousal, and mitochondrial excitability | |
| Inflammation | Copper | Contextual / minor contributor | Participates in redox enzymes and antioxidant networks | |
| Inflammation | Zinc | Contextual / minor contributor | Supports immune signaling; gut barrier integrity disrupted by nutrient deficiencies including zinc | |
| Insulin Response | Magnesium | Contextual / minor contributor | Supports insulin sensitivity and glucose metabolism; magnesium deficiency is associated with insulin resistance; supports enzymes involved in glucose metabolism | |
| Insulin Response | Vitamin B1 (Thiamine) | Contextual / minor contributor | Supports glucose metabolism and insulin sensitivity through mitochondrial function | |
| Methylation | Methionine | Contextual / minor contributor | Essential amino acid that forms S-adenosylmethionine (SAMe), the universal methyl donor for neurotransmitter synthesis and membrane phospholipid methylation | |
| Methylation | Vitamin B6 (Pyridoxine → PLP) | Contextual / minor contributor | Essential cofactor in remethylation of homocysteine to methionine, which is converted to S-adenosylmethionine (SAMe); works with B2, folate, and B12 | |
| Methylation | Vitamin B9 (Folate; 5-MTHF) | Contextual / minor contributor | Essential cofactor in remethylation of homocysteine to methionine, which is converted to S-adenosylmethionine (SAMe); SAMe fuels synthesis of dopamine, norepinephrine, and serotonin and drives phospholipid methylation in neuronal membranes | |
| Methylation | Zinc | Contextual / minor contributor | Deficiencies in vitamins and minerals essential for methylation, such as folate, vitamin B12, and zinc, are correlated to ADHD symptoms; supplementing these micronutrients has shown potential in supporting methylation and reducing symptom severity | |
| Mitochondrial Support | Iron | Contextual / minor contributor | Critical for oxygen delivery to the brain via hemoglobin; supports mitochondrial function and energy production | |
| Mitochondrial Support | 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 Support | Manganese | Contextual / minor contributor | Supports mitochondrial antioxidant defense through MnSOD activity | |
| Mitochondrial Support | Vitamin B1 (Thiamine) | Contextual / minor contributor | Essential for mitochondrial glucose metabolism in the brain leading to ATP production; supports PDH (pyruvate dehydrogenase) and α-KGDH (alpha-ketoglutarate dehydrogenase) function | |
| Neurochemical Balance | Copper | Contextual / minor contributor | Cofactor in dopamine β-hydroxylase, supporting catecholamine synthesis; supports norepinephrine synthesis | |
| Neurochemical Balance | Iron | Contextual / minor contributor | Essential cofactor for tyrosine hydroxylase, the rate-limiting enzyme in the conversion of tyrosine to dopamine; critical for catecholamine synthesis | |
| Neurochemical Balance | 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 | |
| Neurochemical Balance | 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 | |
| Neurochemical Balance | Potassium | Contextual / minor contributor | Critical for membrane potential, nerve signaling, and neuronal excitability; adequate intake balances sodium effects | |
| Neurochemical Balance | 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 | |
| Neurochemical Balance | Vitamin B6 (Pyridoxine → PLP) | Contextual / minor contributor | Cofactor for synthesis of dopamine, serotonin, GABA, and glutamate; supports rate-limiting steps in catecholamine synthesis; requires PDXK activation with magnesium and ATP support | |
| Neurochemical Balance | Vitamin B9 (Folate; 5-MTHF) | Contextual / minor contributor | Supports neurotransmitter synthesis through methylation; cofactor for dopamine synthesis alongside iron, B6, and omega-3s | |
| Neurochemical Balance | Zinc | Contextual / minor contributor | Important for DNA synthesis, cell division, and neurotransmitter regulation, particularly in modulating dopamine—a key neurotransmitter implicated in ADHD; acts as an allosteric modulator of the GABA receptor; supports glutamate regulation | |
| Oxidative Stress | Copper | Contextual / minor contributor | Included in antioxidant enzyme networks; interacts with iron metabolism affecting oxidative stress | |
| Oxidative Stress | Manganese | Contextual / minor contributor | Essential cofactor for MnSOD (SOD2), supporting detoxification of superoxide within the mitochondrial matrix | |
| Oxidative Stress | Zinc | Contextual / minor contributor | Essential mineral that serves as a cofactor for antioxidant enzymes; works synergistically with other antioxidants; heavy metals are detoxified by metallothionein (MT) metal carrier proteins that must bind with zinc and copper | |
| Stress Response | Magnesium | Contextual / minor contributor | Helps manage stress responses; combined with vitamin D reduced behavioral problems; synergy with zinc and omega-3s reported |
References
- Optimal conditions for the endogenous phytases of black beans is 60°C and pH 6.0, that resulted in a 55% reduction in 1P6 after soaking and cooking
- Kidney beans: DIAAS 60-65, Methionine-limited; polyphenol-rich; supports gut health (black beans similar profile)
- Pair with whole grains or seeds for amino acid complementarity; grain-legume complementarity improves essential amino-acid coverage
- Soaking and sprouting reduces phytates in legumes/grains, improving non-heme iron and zinc bioavailability GREINER and KONIETZNY 1999
- Vitamin C significantly improves non-heme iron absorption by reducing ferric to ferrous iron, with studies showing up to a fourfold increase when consumed together Hallberg et al. 1989