Kimchi

Overview

Kimchi is a Korean fermented vegetable dish that provides live probiotics, GABA, and postbiotic compounds supporting gut-brain axis communication and neurotransmitter balance.

Within the BRAIN Diet framework, fermented foods such as sauerkraut, kimchi, kefir, miso, and kombucha provide live microbes + postbiotic peptides; improved SCFA pools; vagal signaling [1][2].

Key Nutritional Highlights

• Kimchi and lacto-fermented vegetables deliver live lactic acid bacteria and organic acids [1]
• Fermented vegetables contribute postbiotic metabolites relevant to gut–brain axis modulation [2]
• Kimchi is a Korean fermented vegetable dish that provides live probiotics, GABA, and postbiotic compounds supporting gut-brain axis communication and neurotransmitter balance. [1]
• Fermented foods such as sauerkraut, kimchi, kefir, miso, and kombucha provide live microbes + postbiotic peptides; improved SCFA pools; vagal signaling. [2]
• Kimchi is a Korean fermented vegetable dish that provides live probiotics, GABA, and postbiotic compounds supporting gut-brain axis communication and neurotransmitter balance.

Food Context

Synergies

• Part of diverse fermented foods rotation

Preparation

• Consume unpasteurized for live probiotics
• Regular but not excessive intake

Recipes

1 recipe containing this food

Savoury Greens & Egg Breakfast Skillet

A warm savoury breakfast skillet with eggs, greens, and slow carbohydrates for steady morning energy.

Nutrient Tables (per 100 g)

Core nutrients

Nutrient	Amount per 100 g	% RDA per 100 g
Energy	15 kcal	—
Protein	1.1 g	—
Total fat	0.5 g	—
Saturated fat	0.1 g	—
Carbohydrates	2.4 g	—
Fibre	1.6 g	—

Key micronutrients

Nutrient	Amount per 100 g	% RDA per 100 g
Iron	2.5 mg	13.9%
Zinc	0.2 mg	2%
Magnesium	14 mg	3.3%
Selenium	0.5 µg	0.9%
Calcium	33 mg	3.3%
Potassium	151 mg	4.4%
Choline	15.5 mg	2.8%
Folate	52 µg	13%
Vitamin B12	0 µg	0%
Vitamin B6	0.2 mg	12.5%

Reference intakes: US Dietary Reference Intakes for adults (19–50 years; using the higher of male/female values where they differ).

Data provenance (core / micronutrient panel): USDA FoodData Central, Cabbage, kimchi, FDC ID 170392, API, per 100 g edible portion, last checked 2026-03-14

Substances

Substances in this food: editorial (Overview / literature) plus analytical (nutrition table).

10 substances in this food

Vitamin K2 (MK forms)

Calcium handling; potential roles in brain health; often co-occurs with fat-soluble vitamins

Fe²⁺

Iron

Oxygen transport; dopamine synthesis (tyrosine hydroxylase cofactor)

Zn²⁺

Zinc

Cofactor in neurotransmission and antioxidant enzymes; dopamine modulation

Mg²⁺

Magnesium

Enzymatic cofactor (>300 reactions); neurotransmitters; mitochondria; redox balance

Se^2-

Selenium

Antioxidant enzyme cofactor (GPx); supports redox balance

Ca²⁺

Calcium

Bone health; neurotransmission; interacts with vitamin D and K2

K⁺

Potassium

Electrolyte for nerve transmission, muscle function, and blood pressure regulation

Choline

Acetylcholine precursor; methyl donor; phospholipid synthesis for membranes

Vitamin B9 (Folate; 5-MTHF)

One-carbon metabolism; methylation; homocysteine recycling

Vitamin B6 (Pyridoxine → PLP)

PLP cofactor for neurotransmitter synthesis; relies on brain PDXK activation

References

[1] Kimchi and lacto-fermented vegetables deliver live lactic acid bacteria and organic acids. Jakobi et al. 2024. The gut-microbiome in adult Attention-deficit/hyperactivity disorder - A Meta-analysis

[2] Fermented vegetables contribute postbiotic metabolites relevant to gut–brain axis modulation. Antony et al. 2023. Gut microbiome supplementation as therapy for metabolic syndrome