There's something most people don't think about when they pull a carton of eggs from a supermarket shelf: those eggs could be anywhere from three to eight weeks old by the time they reach your fridge. In Australia, eggs can be sold for up to seven weeks after they were packed, and packing can happen up to a week after laying. That's potentially two months between a hen laying an egg and you cracking it into a pan.
It matters more than you might expect.
Eggs are nutrient-dense foods, but that nutrient density is not static. It degrades with time, light, temperature fluctuations, and the slow oxidation that happens once an egg is out of the nest. Research has consistently shown that the vitamin D content of eggs declines measurably over weeks of refrigerated storage. The same applies to certain B vitamins, particularly riboflavin. The omega-3 fatty acids in the yolk — a key reason eggs are celebrated as a brain food and anti-inflammatory protein source — are particularly vulnerable to oxidation over time. A yolk that's been sitting in a cold room for six weeks is chemically different from one that was laid four days ago.
And then there's the yolk colour itself. Supermarket egg yolks are pale yellow. A fresh, pasture-raised egg yolk is deep orange — sometimes almost red. That colour comes from carotenoids like lutein and zeaxanthin, which the hen absorbs from fresh green grass and plants. Hens kept on dried feed without access to pasture can't produce that colour no matter how fresh the egg is, because the compounds simply aren't in their diet. When you crack a Mullion Creek Farm egg from James's hens — hens that are rotated across fresh paddocks continuously — you see that colour difference immediately. It's not cosmetic. It's nutritional.
Lutein and zeaxanthin are the same compounds that accumulate in the human retina and are associated with long-term eye health. They're also antioxidants. You're getting more of them from a pasture-raised egg cracked within a week of laying than from a conventional egg that's been stored for a month.
There's also a structural difference worth noting. Fresh eggs hold their shape when cracked — the white is tight and stands proud of the yolk, the yolk itself is round and firm. An older egg spreads flat. That structural degradation is caused by the breakdown of proteins in the albumen over time, specifically ovomucin. It's not harmful to eat, but it is a visible signal of how far the egg has travelled nutritionally since it was laid.
The practical implication of all this is simple. A fresher egg, from a hen eating a proper diet, gives you more of what you're eating eggs for in the first place — complete protein, fat-soluble vitamins, omega-3s, and antioxidant carotenoids. Not as a premium extra, but as a baseline that conventional supply chains have quietly eroded over decades of storage and distribution.
At YourMarket, Mullion Creek Farm eggs are collected fresh and delivered to your door within days. The hens are GMO-free fed, pasture-raised at 1,800 per hectare, and rotated onto fresh grass. The egg you receive is not the same as the one you'd pick up at the supermarket. It's a different product — one that still has most of what it started with.
That's what freshness actually means.