Phase II Trial of Acai Juice Product in Biochemically Recurrent Prostate Cancer

Integr Cancer Ther. 2018 Dec;17(4):1103-1108. doi: 10.1177/1534735418803755. Epub 2018 Oct 5.


Background: Plant derivatives have been studied as therapies for prostate cancer based on their purported anti-inflammatory and antioxidant properties and low toxicities. The acai berry is an example of a plant rich in phytochemicals, which may slow the growth of prostate cancer.

Methods: This was a phase II, Simon 2-stage clinical trial in patients with biochemically recurrent prostate cancer with a primary endpoint of prostate-specific antigen (PSA) response. Patients were asymptomatic, with a rising PSA of at least 0.2 ng/mL, and were treated with twice daily intake of Acai Juice Product until PSA progression, with a primary endpoint of PSA response.

Results: Twenty-one patients were enrolled in the first stage of the trial. One of those patients had a PSA response within the study time period. The PSA doubling time was lengthened in 71% of patients (95% confidence interval = 48% to 89%) on the trial, and in a small number of responders, this was sustained over an extended time.

Conclusions: This study did not meet its primary endpoint of 50% PSA response. Nevertheless, the overall tolerability and effects on PSA stabilization warrant further exploration in a biochemically recurrent population.

Keywords: acai; biochemical recurrence; clinical trial; nutraceutical; prostate cancer.

Publication types

  • Clinical Trial, Phase II
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Disease Progression
  • Euterpe / chemistry*
  • Fruit and Vegetable Juices
  • Humans
  • Male
  • Middle Aged
  • Neoplasm Recurrence, Local / drug therapy*
  • Neoplasm Recurrence, Local / metabolism
  • Plant Extracts / pharmacology*
  • Prostate-Specific Antigen / metabolism
  • Prostatic Neoplasms / drug therapy*
  • Prostatic Neoplasms / metabolism
  • Treatment Outcome


  • Plant Extracts
  • Prostate-Specific Antigen