February 1998 Issue
Beta-carotene does not boost immune response in older adults, according to Massachusetts researchers. They found no improvement in T-cell immune response in women who received 90 milligrams of beta-carotene a day short-term, or in men who received the equivalent of 25 milligrams a day long-term. T-cell immune function accounts for a large part of the decline in immunity that typically occurs with age. American Journal of Clinical Nutrition, October 1997.
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