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Kellogg's Immunity Claims Draw Fire

CBS News."The city of San Francisco sent a letter this week to Kellogg and the Food and Drug Administration requesting evidence of the immunity claims, suggesting Kellogg "may mislead parents at a time when they are increasingly worried about the spread of the H1N1 virus."And Kelly Brownell, of Yale University's Rudd Center for Food Policy and Obesity, observed to CBS News Correspondent Kelly Wallace that, "It simply defies logic to think that spraying on some vitamins and minerals to a cereal that's otherwise almost 40 percent of its weight in sugar makes a healthy product. It just doesn't add up."

Kellogg counters that the increase in vitamins means the cereals do promote good health.

In a statement, the company says, "These nutrients have been identified by the Institute of Medicine and other studies as playing an important role in the body's immune system. Therefore, we believe the claim ... is supported by reliable and competent scientific evidence."

Kellogg also disputes the claim that it's playing on parents' H1N1 fears, saying it began developing the line of cereals in focus more than a year ago, before most people even knew of H1N1, adding that the cereals have been on store shelves since May.

But registered dietician Keri Glassman, an "Early Show" contributor, was sharply critical of the Kellogg claims Tuesday, telling co-anchor Maggie Rodriguez simply adding some vitamins "absolutely" doesn't make the cereals healthier. "Fortifying healthy foods," Glassman says, "is important and actually is a way that many people in this country meet their nutrient needs. Fortifying a junk food, though, absolutely does not make it health food.

"The second ingredient in Cocoa Krispies, which is the one I have the real problem with, is sugar. It also has high-fructose corn syrup, another refined sugar, and partially hydrogenated oils, otherwise known as trans-fats. Overdosing on sugar actually weakens our immune system. So, although antioxidants are important to boost our immune system, slapping it on a sugared cereal, we can't slap immunity across it. It's very misleading to go parents out there, especially with what's going on in the world right now (H1N1)."

Glassman pointed to several widely-available foods that have been shown to help immunity.

They include:

Oranges, grapefruits and berries
These foods contain vitamin C. Increases the production of infection fighting white blood cells and antibodies that help prevent viruses.

Sunflower seeds, wheat germ and nuts
These foods contain vitamin E, another important antioxidant that stimulates production of cells that help destroy germs.

Contains the active ingredien allicin, which fights infection and bacteria. Also, may help prevent cancer.

Salmon, mackerel, sardines and herring are rich in omega-3 fats, which reduce inflammation, increasing airflow and protecting lungs from colds and respiratory infections.

The amino acid that's responsible for tea's immune boosting abilities is L-theanine, and is found in both black and green tea--decaf versions have it, too.

Beef / Poultry
Zinc is an immune boosting mineral. Mild zinc deficiency can increase your risk of infection. Zinc in your diet is very important for the development of white blood cells, the immune system cells destroy invading bacteria and viruses. You can find zinc in oysters, beans, turkey and beef.

Sweet Potato
Your skin is part of your immune system; it's actually your first line of defense against bacteria and viruses. Beta carotene is a precursor to vitamin A which plays a major role in the production of connective tissue, a key component of skin. Think sweet potatoes, carrots and cantaloupe.

Mushrooms have been used for centuries around the world to boost the immune system. Mushrooms increase the production and activity of white blood cells that fight infection.