If you're wondering how much vitamin E is in a pasture-raised chicken egg yolk, here's what the data shows:

Vitamin E in a Typical Egg Yolk

• A standard large egg yolk (about 17 g) contains approximately 0.44 mg of vitamin E (α-tocopherol) (Medical News Today).
• Per 100 g of egg yolk, vitamin E content ranges from 1.1 mg to 1.9 mg, depending on the source (PMC, Australian Eggs).

Impact of Pasture-Raising

• Studies show that pasture-raised hens produce egg yolks with significantly more vitamin E compared to conventional eggs:
  • One controlled study found that pasture-raised eggs have nearly double the vitamin E per yolk compared to caged hens’ eggs (Cambridge University Press & Assessment).
  • Reports from consumer-focused testing (Mother Earth News) suggest pastured eggs contain three times more vitamin E (Alexandre Family Farm).
  • Educational sources confirm that pasture-raised yolks are enriched in vitamins like A, D, E, and K (Understanding Ag, Etta Hills Farm).

Estimated Range for Pasture-Raised Yolk

Estimate Explanation:

• If a conventional yolk contains about 0.44 mg, doubling that (based on the quantitative study) gives roughly 0.9 mg.
• Using the “3×” figure would suggest around 1.3 mg—though somewhat optimistic, it's within a plausible range given the variability in feed and environment.

Final Takeaway

• A standard egg yolk offers ~0.4–0.5 mg of vitamin E.
• A pasture-raised yolk likely provides significantly more—potentially 2× or even 3×, approximating 0.8–1.5 mg of vitamin E per yolk.

Here’s what research indicates about vitamin K₂ content in pastured chicken egg yolks:

Vitamin K₂ in Egg Yolks — General Estimates

• A Reddit user referenced a range of 46 to 192 micrograms (µg) of vitamin K₂ per egg yolk—depending heavily on the chickens’ diet—with pastured hens yielding about 20% more K₂ than grain-fed hens. Two pasture-raised egg yolks could provide about 120 µg of K₂, which meets the typical daily recommended intake. (Reddit)

Laboratory-Based Nutrient Data

• According to data compiled by nutrition researchers (from the Netherlands/USA), egg yolks average around 15.5 µg of K₂ per 100 g, nearly all as MK-4 subtype. (Wikipedia, Dr. Steven Lin)
• Other sources (like those analyzing pastured U.S. eggs) estimate values between 37 and 60 µg per 100 g of yolk. (Dr. Robert Kiltz, Dr. Steven Lin)

Estimated Vitamin K₂ per Egg Yolk

Interpretation

• Typical values: Most egg yolks (standard range) likely contain 4–7 µg of K₂, assuming an average yolk weight of 17–20 g.
• Exceptionally rich yolks: The Reddit-cited upper range (46–192 µg) likely applies to highly optimized pasture systems or biofortification—much higher than average.
• Pasture-raising appears to moderately boost K₂ content (~20%), but enormous variability exists based on feed, breed, and environment limitations.

Bottom Line

• A typical pasture-raised egg yolk likely provides around 4–7 micrograms of vitamin K₂ (mostly MK-4).
• In exceptional cases—such as optimized pastured systems—there may be much higher levels, perhaps dozens of micrograms per yolk. However, those levels aren't yet broadly verified in published nutrient databases.

Here’s a well-supported breakdown of the fat-soluble vitamins — A, D, E, and K₂ — in pasture-raised chicken egg yolks, based on available research:

Nutrient Content in Pasture-Raised Egg Yolks

1. Vitamin A

• Pastured yolks contain roughly 2 to 3 times more vitamin A than conventional cage-raised eggs (Understanding Ag).
• Per average yolk (per Weston A. Price), that equates to approximately 222 to 269 IU of vitamin A, with pasture-raised yolks providing the highest levels (Weston A. Price Foundation).

2. Vitamin D

• Vitamin D levels in eggs can increase significantly if hens have sunlight exposure; some studies show up to 4× more vitamin D in free-range eggs compared to indoor hens (Wikipedia).
• Exact amounts vary and are highly dependent on feed and sun exposure, with some conventional yolks showing higher D than pastured depending on feed fortification (Weston A. Price Foundation).

3. Vitamin E

• Pasture-raised eggs have about 3× more vitamin E compared to conventional eggs (Understanding Ag).
• If a standard yolk has about 0.4–0.5 mg of vitamin E, a pasture-raised yolk could contain approximately 1.2–1.5 mg.

4. Vitamin K₂ (Menaquinone, mainly MK-4)

• Average egg yolk K₂ content (Netherlands): 32.1 µg per 100 g (≈ MK-4) (Wikipedia); U.S. average: 15.5 µg per 100 g.
• A typical egg yolk weighs ~17 g, translating to about 2.6–5.4 µg K₂ per yolk.
• Pasture-raised hens may produce eggs with ~20% more K₂ than conventional hens (Dr. Robert Kiltz, Reddit).
• Popular sources suggest two pasture-raised yolks may provide up to 120 µg K₂, but this figure is anecdotal and likely much higher than average (Reddit, Dr. Robert Kiltz).

Summary Table

Key Takeaways

• Vitamin A and E are significantly increased in pasture-raised yolks.
• Vitamin D presence depends heavily on sunlight and feed, with potential for large increases.
• Vitamin K₂ (MK-4) is present in modest amounts, generally around 3–6 µg per yolk, possibly slightly higher in pasture systems—but not large enough to reach the 100 µg level unless biofortified.