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Food Science: Lamb, Dark Blood, and Shelf Life

2008_06_09-Meat.jpgYesterday we were at the grocery buying lamb for an evening supper. There was only a small selection of lamb loin cuts and chops, and we asked the butcher if they had more. She said no, and then she told us something very interesting about lamb, veal, and other meat.

 
 

She said that lamb has particularly dark blood, so it goes bad much more quickly than other meat. Veal is similar. We don't really eat veal at all, so we hadn't encountered this, but we do eat lamb frequently and have trouble finding the cuts we like. We just assumed that this was because lamb is less popular in the United States than pork and beef, but apparently the shelf life is also an issue.

The butcher told us that the dark blood causes the meat to spoil much more quickly and so they keep much less lamb in stock. We did some cursory research and found some references to a different pH levels in lamb and veal, as well as wild game like deer. We also researched in Harold McGee's tome, but didn't find any references to this.

We're curious - what do you know about dark blood, shelf life, and lamb and veal?

Related: Mini Lamb Burgers on Roasted Potato Rounds

(Image: Flickr member This Year's Love licensed for use under Creative Commons)

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Food Science, Ingredients - Meat, lamb, veal

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Comments (6)

I don't know much about the dark blood thing.

But, lamb and veal are just not as popular as beef or pork. They are both relatively expensive and most people are comfortable with only a couple kinds of cuts so the stock is usually scant at the store (and frozen).

I met a lamb farmer at the market last week and he had all parts of the lamb. I bought some necks and made a delicious (and inexpensive) dinner with them and some green garlic. This week I may try some tongues and ribs.

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posted by art on 2008-06-09 12:32:24
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I know nothing about this dark blood business, but have a question: does the darkness of the blood actually make the meat decompose faster, or does the appearance just not look as good as long?

posted by Michelle of Montreal on 2008-06-09 12:53:28
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Lamb and veal are less popular hence the more expensive price. They are also more resistent to (disgusting) intensive rearing practices used in the US. Chicken and beef are much less expensive in the US than in other countries compared to other food options because of these practices.

Consider buying a whole or half lamb. A small inexpensive freezer will easily hold half of a lamb. It is fun to experiment with different cuts. We store one on our patio. The quality is higher, the price is better, and the air miles are much lower than imported Australian.

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posted by JudiAU on 2008-06-09 13:30:40
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There does seem to be a difference in the pH of beef vs. lamb, at least according to some articles in the journal "Meat Science" (seriously I couldn't even make that up). The pH difference only occurs after the animals are slaughtered. Maybe that it what accounts for the "dark blood" appearance, and/or the earlier spoilage.

I am suspicious of your butcher's explanation, because I doubt that lamb's blood is significantly different than the blood of any other mammal.

posted by ScienceandtheCity on 2008-06-09 14:44:07
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Does this mean that lamb bought from the supermarket is fresher than beef bought at one? It sounds like they have to turn things over faster. I really try to avoid buying meat at the supermarket if I can, but sometimes I can't, and it would be nice to know if lamb was a better bet than beef.

posted by Matilda on 2008-06-09 17:26:55
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Freshness at the supermarket can be a confusing concept sometimes.

Much of the fresh seafood and meat like lamb has been frozen, defrosted and then placed in the cooler to give the appearance of being fresh. Most seafood that has been previously frozen is usually labeled "previously frozen" in small print.

With something like lamb, you just have to trust the store's dating methods. You really are better off going to a small butcher shop or your local farmer's market if you are uncertain about the freshness at your supermarket. Supermarkets will try to get away with whatever they can.

Oddly enough, with beef, you don't have to worry about freshness at the supermarket because it is most likely TOO fresh. The beef cattle are slaughtered, packaged and sent to market so fast that the muscle hasn't had enough time to age. 28 days is about the minimum recommended amount of time for beef to age in order to taste the way it should. Under-aged beef can taste overly bloody, like iron.

posted by art on 2008-06-09 18:28:25
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