A modified citrus pectin has been shown to slow the development of prostratecancer. Researchers claim in theJournal of the National Cancer Institute (Vol. 94, No. 24, 1854-1862, December18, 2002) that a regular intake ofmodified citrus pectin lengthened the doubling time of PSA (prostrate specificantigen). Patients with a longer PSA doubling time tend to have better recovery from protstrate cancer.