Sourdough Bread

Overview

Sourdough bread, especially when made with quinoa or other functional flours, provides GABA, improved amino acid bioavailability, and optimized Maillard reaction products (MRPs) with reduced acrylamide.

Within the BRAIN Diet framework, quinoa sourdough offers both very high nutrients (due to the quinoa) and a high GABA profile, and sourdough fermentation enhances bioavailability of amino acids through activation of endogenous cereal proteases [1].

Key Nutritional Highlights

• Reports on proteolysis in sourdough fermentations: mechanisms and potential for improved bread quality [1]
• Sourdough bread, especially when made with quinoa or other functional flours, provides GABA, improved amino acid bioavailability, and optimized Maillard reaction products (MRPs) with reduced acrylamide. [1]
• Quinoa sourdough offers both very high nutrients (due to the quinoa) and a high GABA profile, and sourdough fermentation enhances bioavailability of amino acids through activation of endogenous cereal proteases.
• Sourdough bread, especially when made with quinoa or other functional flours, provides GABA, improved amino acid bioavailability, and optimized Maillard reaction products (MRPs) with reduced acrylamide.

Food Context

Preparation

• Use whole grain or pseudograin flours for higher nutrient content
• Long fermentation (12-18h) improves amino acid release
• Dutch oven baking reduces acrylamide formation
• Glycine addition (0.3-0.4%) further reduces acrylamide
• Traditionally fermented breads optimize Maillard Reaction Products (MRPs)

Essential Amino Acid Profile

Sourdough Bread contribute plant protein. Pair with complementary protein sources (e.g. grains and legumes) for a balanced essential amino acid profile.

Recipes

1 recipe containing this food

Salmon & Grated Beetroot Toast (with Lemon)

A fast, brain-forward open sandwich combining omega-3 rich salmon, nitrate/polyphenol beetroot, and lemon acidity for a sharp, savoury bite.

Nutrient Tables (per 100 g)

Core nutrients

Nutrient	Amount per 100 g	% RDA per 100 g
Energy	272 kcal	—
Protein	10.8 g	—
Total fat	2.4 g	—
Saturated fat	0.5 g	—
Carbohydrates	51.9 g	—
Sugars	4.6 g	—
Fibre	2.2 g	—

Key vitamins and minerals

Nutrient	Amount per 100 g	% RDA per 100 g
Iron	3.9 mg	21.7%
Zinc	1 mg	9.5%
Magnesium	32 mg	7.6%
Manganese	0.6 mg	25.1%
Potassium	117 mg	3.4%
Copper	0.2 mg	16.9%

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, Bread, french or vienna (includes sourdough), FDC ID 172675, SR Legacy bulk (April 2018), per 100 g edible portion, last checked 2026-08-15

Substances

Substances admitted through a supported nutrition-table row. Not every table row appears here. Cards are not BRS mappings.

6 substances in this food

Cu²⁺

Copper

Cofactor in redox enzymes; dopamine β-hydroxylase; iron metabolism interplay

Fe²⁺

Iron

Oxygen transport; dopamine synthesis (tyrosine hydroxylase cofactor)

Mg²⁺

Magnesium

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

Mn²⁺

Manganese

Cofactor for MnSOD (SOD2); mitochondrial antioxidant defense

K⁺

Potassium

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

Zn²⁺

Zinc

Cofactor in neurotransmission and antioxidant enzymes; dopamine modulation

References

[1] Sourdough fermentation enhances bioavailability of amino acids through activation of endogenous cereal proteases. Gänzle & Loponen 2008. Proteolysis in sourdough fermentations: mechanisms and potential for improved bread quality