Ingredient Information:
Shrimp
There are two main types of shrimp –cold water shrimp and warm
water shrimp. For the most part domestic shrimp available in U.S. markets
is of the warm water variety and is caught in the Gulf of Mexico (think
Bubba Gump Shrimp Company here). Thailand and South America, however, have
become a major exporters of shrimp to the world.
There are three main species of shrimp – white, pink and brown.
Brown shrimp have a stronger flavor because of a high iodine
content. I have actually purchased brown shrimp that I couldn’t eat
because of the strong iodine flavor (this is rare).
White shrimp have shells that are a gray green color. White shrimp
are more delicate in flavor and, as such, generally cost
more but are your best choice. The Mexican white shrimps
are very good but most white shrimp in the market are farm raised in China.
Pink shrimp range in color from pink to a light yellow. The most
common shrimp in markets today is known as the Black Tiger
shrimp. These guys are mostly farmed in Asia and are not
of very consistent quality.
I used to vacation a lot along the coast of South Carolina and would
go to the docks for fresh shrimp. The flavor is incomparable. Practically
speaking, it’s hard to buy fresh shrimp today because it’s
not widely available and most of the shrimp sold is processed and frozen
quickly after catching. Because shrimp is so delicate, only the most careful
handling will result in truly fresh product. Occasionally your local fish
market may have fresh shrimp but try to use it the day you buy it. You
are better off to buy good quality frozen shrimp and thaw it yourself.
I never buy shrimp that has been peeled and de-veined.
If it is handled well, shrimp that has been frozen and thawed
is usually of very good quality. Look for firm shrimp with little softening
of the shells. If the tail pulls away easily it is not fresh. Quality shrimp,
whether it is fresh or has been frozen, will have a fresh
clean odor. It should have the light salty smell of the ocean. Shrimp with
dark spots (called melanosis) is, however, an indication that they are
not as fresh.
Shrimp is sold by size, and the grading system (that isn’t very
accurate) based on the number of shrimp per pound. Small shrimp will have
36 – 45 per pound, medium 31 – 35, large 21 – 30, extra
large 16 – 20 and jumbo, which are 11 – 15 per pound.
Colossal shrimp (less than 10 shrimp per lb.) are often referred to as
Prawns in this country, although prawns are actually a different species.
4 ounces shrimp = 120 calories, 2g fat, 0g sat fat, 0g mono fat, 23g
protein, 1g carbohydrates, 167mg sodium, 170mg cholesterol, Vitamin K 0mcg
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At least once a week I'll be talking with a patient about their
high cholesterol and it seems like every third person will
say, "But
Doc, I don't eat any shrimp!" Almost every time they're
shocked when I say tell them that shrimp is OK. The best part is that
this gets their attention and I love talking about the things you can
eat.
Eat fish now. Eat fish later:
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shown that eating these fish will help reduce the risk of specific cancers.
Fish Really IS Brain Food!
I’m sure you’ve heard the old saw, too: “Fish is brain food!” While research has shown that eating fish and omega-3 fatty acids have been associated with lower risk of Alzheimer disease and stroke, a study in the Archives of Neurology this month (Arch Neurol. 2005;62:1-5) seems to show that eating fish helps reduce the cognitive decline associated with aging.
One fish, Two fish, Mercury in Your Fish
I had a patient ask about fish the other day. This was after I mentioned that with his risk factors for heart disease he would do well to eat at least two servings of fish per week. He responded that he was worried about the reports of "mercury and other stuff" in fish and wanted to know what to do.