The evidence for the effectiveness of B serrata extracts is encouraging but not compelling
OBJECTIVE To assess evidence from r and omised clinical trials about the effectiveness of  extracts of Boswellia serrata ( frankincense ) .
Possible advantages and drawbacks of adding flexible sigmoidoscopy to hemoccult-II in screening for colorectal cancer. A randomized study.
BACKGROUND Flexible sigmoidoscopy ( FS ) has been recommended as a screening method to reduce mortality from colorectal cancer ( CRC ) . The present study evaluates the effect of adding FS to the fecal occult blood test Hemoccult-II ( H-II ) on diagnostic yield of colorectal neoplasia . METHODS A total of 10,978 normal persons aged 50 - 75 years were invited to participate , 5495 persons being allocated at r and om to H-II and FS and 5483 to H-II alone .  RESULTS In spite of a lower compliance ( 40 % versus 56 % ) for the combined procedure , the diagnostic yield of colorectal neoplasia was higher than for H-II alone ( 12 CRC versus 4 CRC , and 72 large adenomas versus 14 ) . Within 24 - 62 months after screening there were fewer CRCs detected after  H-II + FS than after H-II alone . The stage distribution was less favorable than in screen-detected cases . CONCLUSION One FS may not be an optimal way of screening , but FS deserves to be evaluated in r and omized population studies including repeated H-II tests in the control arm
The evidence for the effectiveness of B serrata extracts is encouraging but not compelling
OBJECTIVE To assess evidence from r and omised clinical trials about the effectiveness of  extracts of Boswellia serrata ( frankincense ) .