About DBIS   | Story archive   | Contact DBIS  | DBIS home

Pleasing Your Palate

Biological Engineers Devise Better Meat Substitute

October 1, 2004

Researchers have developed a soy-based meat substitute with a consistency like that of meat. Using a machine called a heat extruder to mix powdered vegetable proteins in a high moisture setting, the researchers pump in about 60 percent water with the soy proteins, which creates a composition similar to that of muscle tissue. The heat in the extruder lines up the proteins in a way that mimics meat's consistency. The final product looks like chicken breast

What's the difference between vegetable proteins and meat proteins?

Science behind the news is funded by a generous grant from the NSF

Veggie proteins naturally have a different mouth feel than meat proteins, because of the way the protines stack up in a pile. "Mouth feel" describes how thick or thin, or how oily or watery a food feels in your mouth. The tongue can detect all kinds of different textures. For example, a milkshake will have a thicker mouth feel than water, and skim milk will have a more watery, thin mouth feel than whole milk. This is why foamy foods, such as whipped cream or soufflés, are so much fun to eat: scientists surmise that these types of foods touch all the taste buds at once. It's also why reducing the fat content in foods often ruins the taste and texture. Fat is a key ingredient in determining a food's texture. The more fat there is, the thicker and richer the mouth feel.

A seven-year medical study found that older women who got most of their protein from animal sources, such as meat or milk, had a much higher rate of hip fracture from women who relied on plant sources, such as tofu, beans and whole grains.

You don't have to eat meat to get enough protein in your diet. Beans, tofu, whole grains, and other vegetables all contain protein. Here's a sampling of high protein percentages in plant foods:

Spinach49%
Broccoli45%
Lettuce34%
Cauliflower40%
Kale45%
Bean sprouts43%
Bamboo shoots39%
Mushrooms38%
Navy beans26%
Soybean sprouts54%
Pumpkin seeds21%
Wheat germ31%
Zucchini28%

The American Society for Microbiology contributed to the TV portion of this report.


Video help

Latest stories

  • A Satellite Named Violet and a Student Named Amanda
  • Behind the Scenes with the K-Team
  • Deep Space Discoveries
  • Dogs Fighting Cancer
  • Earthquake! What's Your Risk

Did you know?...

  • We can only taste substances that can dissolve in water or saliva.
  • You may have heard that there are four areas of the tongue that taste specific flavors. But it turns out that telling the difference between sweet, salty, bitter and sour has less to do with a specific area of the tongue, and more to do with how each substance reacts chemically. Different foods emit different chemicals and send a different electrical signal to the brain.

More information on this story

Martha J. Heil
mheil@aip.org
American Institute of Physics
Tel: 301-209-3088


© 2011 American Institute of Physics