Stephen Bent, MD
4150 Clement St
San Francisco, CA 94121
Dr. Bent's main research interest is the evaluation of the safety and efficacy of herbal remedies and dietary supplements. He served as the project director for one of the first large randomized controlled trials of saw palmetto for enlarged prostate, which gained international recognition for demonstrating that this commonly used herb was no more effective than placebo. Dr. Bent has also served as the principal investigator or co-investigator of several other large randomized controlled trials, including a study of a Chinese herbal remedy used to treat fatigue in the elderly and an internet-based study examining the efficacy of the herbs valerian (for sleep) and kava (for anxiety). Recently, Dr. Bent has stated to conduct randomized controlled trials of complementary and alternative therapies in children with autism, including studies of omega-3 fatty acids and vitamin D. Dr. Bent is also the Principal Investigator of the first-ever fully internet-based randomized controlled trial of a pharmaceutical drug, and he hopes to develop the internet-based technology to speed the testing of promising new therapies. Dr. Bent is an expert in evidence-based medicine and ambulatory care, and has coauthored textbooks in both areas.
Education and Training
Degree or Training
University of California, San Francisco
School of Medicine - Internal Medicine
In the News
Recent Articles (45)
Bent S, Dang K, Widjaja F, Lawton B. Examining Clinics for Children with Autism: The Autism Translating To Treatments (AT3) Study. J Altern Complement Med. 2017 Jan 13.
Hendren RL, James SJ, Widjaja F, Lawton B, Rosenblatt A, Bent S. Randomized, Placebo-Controlled Trial of Methyl B12 for Children with Autism. J Child Adolesc Psychopharmacol. 2016 Nov; 26(9):774-783.
Wang RC, Bent S, Weber E, Neilson J, Smith-Bindman R, Fahimi J. The Impact of Clinical Decision Rules on Computed Tomography Use and Yield for Pulmonary Embolism: A Systematic Review and Meta-analysis. Ann Emerg Med. 2016 Jun; 67(6):693-701.e3.
Bent S, Hendren RL. Complementary and alternative treatments for autism part 1: evidence-supported treatments. AMA J Ethics. 2015 Apr; 17(4):369-74.
Bent S, Hendren RL, Zandi T, Law K, Choi JE, Widjaja F, Kalb L, Nestle J, Law P. Internet-based, randomized, controlled trial of omega-3 fatty acids for hyperactivity in autism. J Am Acad Child Adolesc Psychiatry. 2014 Jun; 53(6):658-66.
Bent S, Bertoglio K, Ashwood P, Nemeth E, Hendren RL. Brief report: Hyperbaric oxygen therapy (HBOT) in children with autism spectrum disorder: a clinical trial. J Autism Dev Disord. 2012 Jun; 42(6):1127-32.
Tokman S, Schuetz P, Bent S. Procalcitonin-guided antibiotic therapy for chronic obstructive pulmonary disease exacerbations. Expert Rev Anti Infect Ther. 2011 Jun; 9(6):727-35.
Bent S, Bertoglio K, Ashwood P, Bostrom A, Hendren RL. A pilot randomized controlled trial of omega-3 fatty acids for autism spectrum disorder. J Autism Dev Disord. 2011 May; 41(5):545-54.
Bent S, Hendren RL. Improving the prediction of response to therapy in autism. Neurotherapeutics. 2010 Jul; 7(3):232-40.
Singer JP, Kohlwes J, Bent S, Zimmerman L, Eisner MD. The impact of a "low-intensity" versus "high-intensity" medical intensive care unit on patient outcomes in critically ill veterans. J Intensive Care Med. 2010 Jul; 25(4):233-9.
Tsourounis C, Bent S. Why change is needed in research examining dietary supplements. Clin Pharmacol Ther. 2010 Feb; 87(2):147-9.
Bitting RL, Bent S, Li Y, Kohlwes J. The prognosis and treatment of acquired hemophilia: a systematic review and meta-analysis. Blood Coagul Fibrinolysis. 2009 Oct; 20(7):517-23.
Nguyen SP, Bent S, Chen YH, Terdiman JP. Gender as a risk factor for advanced neoplasia and colorectal cancer: a systematic review and meta-analysis. Clin Gastroenterol Hepatol. 2009 Jun; 7(6):676-81.e1-3.
Daniels NA, Chen YH, Bent S. Antibiotic and anti-inflammatory use and the risk of prostate cancer. BMC Res Notes. 2009; 2:57.
Bent S, Bertoglio K, Hendren RL. Omega-3 fatty acids for autistic spectrum disorder: a systematic review. J Autism Dev Disord. 2009 Aug; 39(8):1145-54.
Simon JA, Chen YH, Bent S. The relation of alpha-linolenic acid to the risk of prostate cancer: a systematic review and meta-analysis. Am J Clin Nutr. 2009 May; 89(5):1558S-1564S.
Kangelaris KN, Bent S, Nussbaum RL, Garcia DA, Tice JA. Genetic testing before anticoagulation? A systematic review of pharmacogenetic dosing of warfarin. J Gen Intern Med. 2009 May; 24(5):656-64.
Bent S. Herbal medicine in the United States: review of efficacy, safety, and regulation: grand rounds at University of California, San Francisco Medical Center. J Gen Intern Med. 2008 Jun; 23(6):854-9.
Avins AL, Bent S, Padula A, Staccone S, Badua E, Goldberg H. Initial experience with a group presentation of study results to research participants. Trials. 2008; 9:16.
Avins AL, Bent S, Staccone S, Badua E, Padula A, Goldberg H, Neuhaus J, Hudes E, Shinohara K, Kane C. A detailed safety assessment of a saw palmetto extract. Complement Ther Med. 2008 Jun; 16(3):147-54.
Li JZ, Winston LG, Moore DH, Bent S. Efficacy of short-course antibiotic regimens for community-acquired pneumonia: a meta-analysis. Am J Med. 2007 Sep; 120(9):783-90.
Margaretten ME, Kohlwes J, Moore D, Bent S. Does this adult patient have septic arthritis? JAMA. 2007 Apr 4; 297(13):1478-88.
Bent S, Padula A, Moore D, Patterson M, Mehling W. Valerian for sleep: a systematic review and meta-analysis. Am J Med. 2006 Dec; 119(12):1005-12.
Avins AL, Bent S. Saw palmetto and lower urinary tract symptoms: what is the latest evidence? Curr Urol Rep. 2006 Jul; 7(4):260-5.
Kohlwes RJ, Shunk RL, Avins A, Garber J, Bent S, Shlipak MG. The PRIME curriculum. Clinical research training during residency. J Gen Intern Med. 2006 May; 21(5):506-9.
Bent S, Padula A, Avins AL. Brief communication: Better ways to question patients about adverse medical events: a randomized, controlled trial. Ann Intern Med. 2006 Feb 21; 144(4):257-61.
Bent S, Kane C, Shinohara K, Neuhaus J, Hudes ES, Goldberg H, Avins AL. Saw palmetto for benign prostatic hyperplasia. N Engl J Med. 2006 Feb 9; 354(6):557-66.
Bent S, Goldberg H, Padula A, Avins AL. Spontaneous bleeding associated with ginkgo biloba: a case report and systematic review of the literature: a case report and systematic review of the literature. J Gen Intern Med. 2005 Jul; 20(7):657-61.
Jacobs BP, Bent S, Tice JA, Blackwell T, Cummings SR. An internet-based randomized, placebo-controlled trial of kava and valerian for anxiety and insomnia. Medicine (Baltimore). 2005 Jul; 84(4):197-207.
Avins AL, Bent S, Neuhaus JM. Use of an embedded N-of-1 trial to improve adherence and increase information from a clinical study. Contemp Clin Trials. 2005 Jun; 26(3):397-401.
Liu R, Nair D, Ix J, Moore DH, Bent S. N-acetylcysteine for the prevention of contrast-induced nephropathy. A systematic review and meta-analysis. J Gen Intern Med. 2005 Feb; 20(2):193-200.
Bent S, Padula A, Neuhaus J. Safety and efficacy of citrus aurantium for weight loss. Am J Cardiol. 2004 Nov 15; 94(10):1359-61.
Terasawa T, Blackmore CC, Bent S, Kohlwes RJ. Systematic review: computed tomography and ultrasonography to detect acute appendicitis in adults and adolescents. Ann Intern Med. 2004 Oct 5; 141(7):537-46.
Bent S, Shojania KG, Saint S. The use of systematic reviews and meta-analyses in infection control and hospital epidemiology. Am J Infect Control. 2004 Jun; 32(4):246-54.
Bent S, Ko R. Commonly used herbal medicines in the United States: a review. Am J Med. 2004 Apr 1; 116(7):478-85.
Bent S, Xu L, Lui LY, Nevitt M, Schneider E, Tian G, Guo S, Cummings S. A randomized controlled trial of a Chinese herbal remedy to increase energy, memory, sexual function, and quality of life in elderly adults in Beijing, China. Am J Med. 2003 Oct 15; 115(6):441-7.
Gupta S, Bent S, Kohlwes J. Test characteristics of alpha-fetoprotein for detecting hepatocellular carcinoma in patients with hepatitis C. A systematic review and critical analysis. Ann Intern Med. 2003 Jul 1; 139(1):46-50.
Bent S, Tiedt TN, Odden MC, Shlipak MG. The relative safety of ephedra compared with other herbal products. Ann Intern Med. 2003 Mar 18; 138(6):468-71.
Bent S, Saint S. The optimal use of diagnostic testing in women with acute uncomplicated cystitis. Am J Med. 2002 Jul 8; 113 Suppl 1A:20S-28S.
Bent S, Nallamothu BK, Simel DL, Fihn SD, Saint S. Does this woman have an acute uncomplicated urinary tract infection? JAMA. 2002 May 22-29; 287(20):2701-10.
Mar C, Bent S. An evidence-based review of the 10 most commonly used herbs. West J Med. 1999 Sep; 171(3):168-71.
Bent S, Saint S, Vittinghoff E, Grady D. Antibiotics in acute bronchitis: a meta-analysis. Am J Med. 1999 Jul; 107(1):62-7.
Bent S. Commentary: Adulterants in herbal products: dangerous and deceitful. West J Med. 1999 May; 170(5):259-60.
Saint S, Bent S, Vittinghoff E, Grady D. Antibiotics in chronic obstructive pulmonary disease exacerbations. A meta-analysis. JAMA. 1995 Mar 22-29; 273(12):957-60.
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