Soybeans are regarded as equal in protein quality to animal foods. Just 4 ounces of tempeh provides 41.3% of the Daily Value (DV) for protein for less than 225 calories and only 3.7 grams of saturated fat. Plus, the soy protein in tempeh tends to lower cholesterol levels, while consuming protein from animal sources tends to raise them, since they also include saturated fat and cholesterol. In addition to healthy protein, some of tempeh’s nutritional high points include:
Riboflavin: 4 ounces of tempeh provides 23.5% of the DV for this B-vitamin. A nutrient essential for the transfer reactions that occur to produce energy in the mitochondria, riboflavin is also a cofactor in the regeneration of one of the liver’s most important detoxification enzymes, glutathione.
Magnesium: Tempeh also provides 21.9% of the DV for Nature’s blood vessel relaxant, magnesium, in just 4 ounces. In addition to its beneficial role in the cardiovascular system, magnesium plays an essential role in more than 300 enzymatic reactions, including those that control protein synthesis and energy production.
Manganese and Copper: That same 4 ounces of tempeh will give you 72.5% of the DV for manganese and 30.5% of the DV for copper. These two trace minerals serve numerous physiological functions including being cofactors for the antioxidant enzyme superoxide dismutase.
Beneficial Effects on Cholesterol Levels and Platelets
Soy protein has been found in recent years to be excellent for a number of different conditions, one of the most important ones being heart disease. Soy protein has been shown in some studies to be able to lower total cholesterol levels by 30% and to lower LDL, or “bad” cholesterol, levels by as much as 35-40%. This is important because high levels of cholesterol, especially LDL cholesterol, tend to become deposited into the walls of blood vessels, forming hard plaques. If these plaques grow too large or break, they can cause a heart attack or stroke.
Some studies have even shown that soy protein may be able to raise HDL cholesterol levels. HDL cholesterol travels through the body collecting the cholesterol that has been deposited in the arteries, so it can be taken away and removed by the liver. One of the main goals of atherosclerosis treatment and prevention, therefore, is to lower LDL cholesterol levels while raising HDL levels. And soy is one food that may be able to do both at once.
In addition, soy foods like tempeh are rich in dietary fiber. When eaten, the fiber in tempeh binds to fats and cholesterol in food, so less is absorbed. In addition, tempeh’s fiber binds to bile salts and removes them from the body. Since the liver gets rid of cholesterol by transforming it into bile salts, their removal by fiber forces the liver to use more cholesterol to form more bile salts, leading to lower cholesterol levels overall.
Stabilize Blood Sugar at Healthy Levels
Another condition for which tempeh can be very beneficial is diabetes, particularly type 2 diabetes. The protein in tempeh is excellent for diabetic patients, who tend to have problems with animal sources of protein. The protein and fiber in tempeh can also prevent high blood sugar levels and help in keeping blood sugar levels under control. Some diabetics even find that the effects of soy foods, such as tempeh, and other legumes on blood sugar are so profound that they need to monitor their new blood sugar levels and adjust their medications accordingly. Of course, all of this should only be done under the supervision of a doctor. Diabetes patients are especially susceptible to atherosclerosis and heart disease, which is the number one killer of persons with diabetes. Keeping cholesterol levels low with soy foods may be useful for preventing these heart problems. In addition, soy foods have been shown to lower high triglyceride levels. Triglyceride levels tend to be high in diabetic patients, and high triglyceride levels are another factor of diabetics’ increased risk for heart disease.
Promotes Gastrointestinal Health
The fiber in tempeh also provides preventative therapy for several other conditions. Fiber is able to bind to cancer-causing toxins and remove them from the body, so they can’t damage colon cells. Tempeh, which is made from high-fiber soybeans, may therefore be able to help reduce the risk of colon cancer. As a matter of fact, in areas of the world where soy foods are eaten regularly, rates of colon cancer, as well as some other cancers, including breast cancer, tend to be low.
A Healthy Transition through Menopause
One of the more popular uses of soy foods lately has been in the treatment of menopausal symptoms. Soybeans contain active compounds called isoflavones that act like very weak estrogens in the body. These phytoestrogens bind to estrogen receptors and may provide enough stimulation to help eliminate some of the uncomfortable symptoms that occur when natural estrogen levels decline. Studies have shown that women who consume soy foods report a significant reduction in the amount of hot flashes that they experience. There is also some evidence that soy foods may even be able to help reduce the bone loss that typically occurs after menopause. And as women’s risk for heart disease significantly increases at menopause, soy foods’ numerous beneficial cardiovascular effects make tempeh a particularly excellent choice for frequent consumption as menopause approaches.
Promotes Men’s Health
In epidemiological studies, genistein, a naturally occuring isoflavone found chiefly in soy foods, has been consistently linked to lower incidence of prostate cancer. A recent study of human prostate cancer cells demonstrated some of the mechanisms behind genistein’s anti-prostate cancer effects. Genistein not only induced chemicals that block cell cycling, thus preventing the proliferation of cancerous cells in the prostate, but at high concentrations actually induced apoptosis, the self-destruct sequence the body uses to eliminate worn out or abnormal cells.
Another study looked at the antioxidant effects of these isoflavones in soy, and found that genistein protected cells in healthy men from an increase in free radical production by inhibiting the activation of an important inflammatory agent called NF-kappaB and by decreasing levels of DNA adducts (a marker of DNA damage).
(Source:http://whfoods.org/genpage.php?tname=foodspice&dbid=126)