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CompletedNCT00844792Updated Oct 26, 2017

Study of Antioxidants on Prostate Tumors in Men Undergoing Radical Prostatectomy for Prostate Cancer

A Phase 2 interventional study of Lycopene, Vitamin D3, Selenium, Green Tea Extract, Vitamin E and Placebo in Cancer of the Prostate, Prostate Cancer and Prostatic Neoplasms, sponsored by University Health Network, Toronto. Completed at 1 site in Canada. Open to male participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2017-10-26.

Sponsored by University Health Network, Toronto · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
48
Allocation
Randomized
Ages
18 Years and older
Sex
Male
01

Study summary

The purpose of this study is to see if an intervention of antioxidants(vitamin E, selenium and lycopene) can change (reduce) prostate tumor size and alter certain markers that can affect tumor growth and prostate cancer aggressiveness.

02

Conditions studied

  • Cancer of the Prostate
  • Prostate Cancer
  • Prostatic Neoplasms

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Keywords

  • Male Urogenital Diseases
  • Antioxidants
  • Vitamin E
  • Vitamin D
  • Lycopene
  • Selenium
03

In context

Prostatic Neoplasms

6,370 studies on the registry are indexed under Prostatic Neoplasms; 1,400 are open to participants now.

This study's enrollment of 48 is below the median of 58 across 4,822 interventional studies indexed under Prostatic Neoplasms.

Browse Prostatic Neoplasms studies →

Lead sponsor

University Health Network, Toronto is the lead sponsor of 1,411 studies on the registry; 292 are open to participants now.

Of its 17 completed or terminated interventional studies of FDA-regulated products, 3 (18%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
Male
Accepts healthy volunteers
No

Inclusion criteria

  • Diagnosis of a Gleason score > or = to 7 adenocarcinoma of the prostate
  • At least 30% of one core involved
  • Radical prostatectomy planned
  • Willingness to discontinue use of supplements at least 4 weeks prior to study intervention (for subjects using vitamin E, selenium or lycopene at time of consent)
  • ability and willingness to consume study intervention for 6 - 8 weeks prior to radical prostatectomy.

Exclusion criteria

Exclusion Criteria:

  • Previous treatment for prostate cancer
  • Current use of finasteride or dutasteride
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
48 participants (actual)

Study arms

  • Experimental
    1

    This group of men will be on active treatment (antioxidants)for 6-8 weeks prior to their radical prostatectomy.

    Dietary Supplement: Lycopene, Vitamin D3, Selenium, Green Tea Extract, Vitamin E

  • Placebo comparator
    2

    This group of men will be on placebo for 6-8 weeks prior to their radical prostatectomy.

    Drug: Placebo

Interventions

  • Dietary supplementLycopene, Vitamin D3, Selenium, Green Tea Extract, Vitamin E

    Twice a day with meals. Lycopene - 20 mg, Vitamin D3 - 200 IU, Selenium - 100 mcg, Green Tea Extract - 75 mg, Vitamin E - 50 IU

  • DrugPlacebo

    Twice a day with meals.

06

What researchers measure

Primary outcomes

  1. To determine the impact of combination Vitamin E, Selenium and Lycopene on prostate tumor size and to study certain markers in blood and prostate tissue which affect prostate tumor growth or shrinkage.

    Time frame: Blood samples will be collected prior to intervention and 8 weeks later , prior to surgery. Prostate tissue will be harvested at time of surgery, after the prostate has been removed.

07

Study locations

1 site
  • University Health Network, Princess Margaret Hospital
    Toronto, Ontario M5G 2M9, Canada
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 26, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT00844792
Lead sponsor
University Health Network, Toronto
Responsible party
Sponsor
First posted
Feb 16, 2009
Start date
Oct 2008
Primary completion
Dec 2013
Completion
Dec 2013
Last update
Oct 26, 2017

Study contacts

Neil Fleshner
principal investigator · Princess Margaret Hospital, Canada

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Oct 2017. You cannot join it, but the record below documents what was studied.

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