NUTRITIONAL LOG

The Truth About Egg Yolk

A Deep-Research Journal

Dr. Aria Vance
Dr. Aria Vance Lead Nutrition Data Scientist
Last Reviewed: Jun 3, 2026 • Data Sources: USDA FoodData Central, NutriSnap Volumetric Models

Structured Nutritional Data & Citations

SECTION 1: SEO Data

Egg Yolk: Nutritional Profile and Physical Properties

This entry details the precise nutritional composition and key physical characteristics of the egg yolk, focusing on data per 100g and per standard serving (1 large egg yolk, ~17g).


1. Macronutrients & Calories

Nutrient Per 100g Per 17g (1 large yolk)
Energy (kcal) 322 55
Protein (g) 15.86 2.70
Total Fat (g) 26.54 4.51
Carbohydrate (g) 3.61 0.61
Fiber (g) 0.0 0.0
Sugars (g) 0.66 0.11

2. Key Micronutrients

Vitamins:

Minerals:

Antioxidants & Bioactive Compounds:


3. Functional Impact


4. Physical Properties


5. Citations & References

  1. USDA FoodData Central. Egg, yolk, raw, fresh. FDC ID: 172179. [Accessed: October 26, 2023].
  2. USDA FoodData Central. Egg, whole, raw, fresh. FDC ID: 748967. [Accessed: October 26, 2023].
  3. National Institutes of Health (NIH), Office of Dietary Supplements. Choline Fact Sheet for Health Professionals. [Accessed: October 26, 2023].
  4. American Heart Association. Dietary Fats and Cardiovascular Disease. [Accessed: October 26, 2023].
  5. Journal of Food Science. Physical properties of chicken eggs. (General consensus on egg biophysics).

Field Notes: Dr. Aria Vance

Subject: Egg Yolk
Focus: Volumetric expansion/contraction, historical context, tracking challenges.

SECTION 2: The Elusive Yolk: A Tracking Nightmare

Dr. Aria Vance, Lead Nutrition Data Scientist, NutriSnap.

Why Egg Yolk Is Difficult to Track

This little golden orb. A tiny sun, really, a concentrated burst of life and flavor. From ancient Egyptian tombs featuring egg offerings to the lavish custards of Renaissance Europe, the egg yolk has been a bedrock of human cuisine, a symbol of fertility and sustenance. It binds, it enriches, it transforms simple ingredients into culinary masterpieces. Think hollandaise, mayonnaise – pure yolk magic! But for us, the data scientists, the nutrition data purists… it's a profound, persistent pain point. A tracking nightmare.

Seriously, try to accurately track your egg yolk intake. You crack an egg. Maybe you want just the yolk for a custard, maybe for a protein separation macro goal, or you're just really into making homemade aioli. How many grams is that specific yolk? "Large" eggs vary wildly. A factory "large" is a statistical average, not a guaranteed uniform mass. One morning it's 17g, the next, a hefty 19g. Then there's the separation! Did you get every speck of albumen off? That trace protein, that residual water, it adds up. It skews the data. We're talking about meticulous macro tracking here, not just a casual guess.

And then you cook it. Oh, the cooking! A poached yolk retains more moisture, perhaps, than one fried hard in butter. How much butter? How much oil has it absorbed? The visual transformation changes everything. What was once a vibrant, semi-liquid sphere becomes a dense, chalky disc, or a molten, barely set core. Your perception of its volume, its mass, is completely distorted. The density changes; water evaporates. This isn't a pre-packaged bar with a scannable barcode, folks. It’s an organic, variable, shapeshifting component of your meal.

This constant, nagging imprecision drove me absolutely wild. My team and I spent months, years, grappling with these exact dilemmas for countless ingredients. Measuring cups? Scales? Who, in their actual life, pulls out a food scale for every single egg yolk they consume? Or for the yolk embedded in a quiche, or a crème brûlée? It's impractical, it's tedious, it's a barrier to accurate health data for the average person. It’s a behavioral sinkhole.

That’s why finding NutriSnap was such a revelation. Its forensic visual analysis isn't just counting calories; it's discerning the state of that yolk, estimating its original mass, accounting for cooking changes, even subtly identifying potential oil absorption. It's the difference between a vague approximation and quantifiable, actionable nutritional insight. Finally, the golden orb yields its secrets without requiring a kitchen full of lab equipment. We can track these crucial nutrients, these vibrant compounds, with the precision they deserve. Game changer.

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