Egg Yolks

Overview

Egg yolks provide choline (acetylcholine precursor), lutein/zeaxanthin (carotenoids), and fat-soluble vitamins (A, D, E, K2), supporting neurotransmitter synthesis and brain health. Acetylcholine and choline food sources include egg yolks, fish roe, soy, wheat germ, and liver.

Recipes

1 recipe containing this food

Linguine con le Cozze Mantecate (Linguine with cockles in a silky emulsified sauce)

Whole-wheat linguine with cockles in a silky emulsified sauce; Italian emulsification technique without cream, supporting taurine, B12, and choline intake.

Substances

7 substances in this food

Choline

Acetylcholine precursor; methyl donor; phospholipid synthesis for membranes

Lutein

Neuroprotective carotenoid; accumulates in neural tissues and retina; supports cognitive performance

Vitamin A (Retinoids; β-Carotene precursor)

Neurodevelopment; immune regulation; antioxidant via carotenoids

Vitamin D

Neurotrophic and immune modulation; calcium homeostasis

Vitamin E (Tocopherols/Tocotrienols)

Lipid-phase antioxidant; protects PUFA (DHA) in membranes

Vitamin K2 (MK forms)

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

Zeaxanthin

Neuroprotective carotenoid; accumulates in neural tissues and retina; supports cognitive performance

Preparation Notes

• Choose pasture-raised for higher nutrient content
• Gentle cooking preserves nutrients
• Important for choline and carotenoid intake
• Pair with carotenoid-rich vegetables for enhanced absorption

Biological Target Matrix

Biological Target	Substance	Contribution Level	Therapeutic Areas	Mechanism of Action
Gut–Brain Axis & Enteric Nervous System (ENS)	Choline	Contextual / minor contributor	ADHD, Anxiety & GAD, Depression & MDD, Postnatal Depression (PND / PPD) — Evidence Base	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)	Vitamin D	Contextual / minor contributor	ADHD, Anxiety & GAD, Depression & MDD, Postnatal Depression (PND / PPD) — Evidence Base	Supports gut barrier integrity; nutrient deficiencies including vitamin D disrupt tight junctions, increasing permeability
Inflammation & Oxidative Stress	Choline	Contextual / minor contributor	ADHD, Anxiety & GAD, Depression & MDD, Postnatal Depression (PND / PPD) — Evidence Base, Alzheimer's Disease, Bipolar Disorder	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	Lutein	Contextual / minor contributor	ADHD, Anxiety & GAD, Depression & MDD, Postnatal Depression (PND / PPD) — Evidence Base, Alzheimer's Disease, Bipolar Disorder	Anti-inflammatory properties; supports immune regulation
Inflammation & Oxidative Stress	Zeaxanthin	Contextual / minor contributor	ADHD, Anxiety & GAD, Depression & MDD, Postnatal Depression (PND / PPD) — Evidence Base, Alzheimer's Disease, Bipolar Disorder	Anti-inflammatory properties; supports immune regulation
Metabolic & Neuroendocrine Stress (HPA Axis & ANS)	Choline	Contextual / minor contributor	ADHD, Anxiety & GAD, Depression & MDD, Postnatal Depression (PND / PPD) — Evidence Base	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)	Vitamin D	Contextual / minor contributor	ADHD, Anxiety & GAD, Depression & MDD, Postnatal Depression (PND / PPD) — Evidence Base	Modulates immune responses to reduce inflammation in the brain; supports stress response through neurotrophic and immune effects
Methylation & One-Carbon Metabolism	Choline	Contextual / minor contributor	ADHD, Anxiety & GAD, Depression & MDD, Postnatal Depression (PND / PPD) — Evidence Base, Alzheimer's Disease	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
Mitochondrial Function & Bioenergetics	Choline	Contextual / minor contributor	ADHD, Anxiety & GAD, Depression & MDD, Postnatal Depression (PND / PPD) — Evidence Base, Alzheimer's Disease, Bipolar Disorder	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
Neurotransmitter Regulation	Choline	Contextual / minor contributor	ADHD, Anxiety & GAD, Depression & MDD, Postnatal Depression (PND / PPD) — Evidence Base, Alzheimer's Disease, Bipolar Disorder	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

References

• Acetylcholine and choline: Egg yolks, fish roe, soy, wheat germ, liver
• Carotenoids are abundant in leafy greens, orange and yellow vegetables, corn, and egg yolks
• Pasture-raised egg yolks for nutrient density