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Cancer Health Center

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Keeping Weight on Cancer Patients

WebMD Health News
Reviewed by Gary D. Vogin, MD

April 26, 2002 -- Weight loss during chemotherapy may not be inevitable after all. A study shows that taste and smell are at the root of the problem -- and that those problems may be fixable.

A group of Duke University researchers has been examining the complex relationship that involves appetite, taste, smell, weight loss, nutritional deficits, and the effects of all these factors on the immune system.

It's an important issue: Cancer patients who lose weight typically develop serious nutritional problems that compromise their immunity and chances for long-term survival, says study author Jennifer Garst, MD, assistant professor of oncology at Duke Comprehensive Cancer Center in Durham, N.C.

Garst and colleagues presented their findings at the annual Association of Chemoreception Sciences. Their study is funded by the National Institute on Aging.

"Weight loss has long been a hallmark of cancer, but it has been considered an inevitable byproduct of the disease process and chemotherapy drugs," says co-author Susan Schiffman, PhD, in a news release.

However, weight loss has never been considered a treatable symptom that can affect a patient's outcome, says Schiffman. "If we can show that taste and smell deficits are responsible for the weight loss in a specific population of patients, then we can intervene and potentially improve patient outcomes."

In their studies, the Duke team has linked taste and smell deficits with reduced levels of key immune system cells, like T-cells and B-cells. Even among patients who are eating the same number of calories, those with taste and smell problems often avoid foods with high nutritional value, such as fresh fruits and vegetables -- further depressing the immune system, Schiffman says.

However, Duke studies have also shown that flavor-enhancing powders -- derived from actual foods such as cheese, bacon, garlic, and fruits -- can improve a patient's appetite, leading to significantly higher levels of B-cells and T-cells.

In their current study, the Duke group looked specifically at the issue of taste and smell deficits. They also investigated the use of these flavor powders to make food more appealing to patients.

In their study of 33 lung cancer patients undergoing chemotherapy, the Duke researchers tested patients' ability to detect and recognize odors and flavors presented to them in the laboratory. Patients who reported the lowest degree of taste and smell ability -- and who had lowest T-cell and B-cell levels -- also had the most weight loss, body mass loss, and nutritional deficits.

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