Did vitamins prevent cancer? 33,000 people tracked for decades
NCT ID NCT00342654
First seen Nov 01, 2025 · Last updated Jun 22, 2026 · Updated 38 times
Summary
This study follows up on a large trial from the 1980s where over 33,000 people in Linxian, China, took vitamin and mineral supplements to see if they could prevent esophageal and stomach cancer. Researchers are now tracking cancer cases and deaths in the years after the supplements stopped, and collecting blood samples to study genetic and environmental factors. The goal is to understand if the earlier benefits, like reduced stomach cancer, lasted over time.
Disclaimer
Read more
Show less
This is a summary of
the original study
.
Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for ESOPHAGEAL CANCER are added.
Genom att skicka in godkänner du våra Användarvillkor
Contacts and locations
Show contact details
Enter your email to view the contact information for this study.
Genom att skicka in godkänner du våra Användarvillkor
Locations
-
Cancer Institute and Hospital, Chinese Academy of Medical Sciences
Beijing, China
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
vitamins and minerals (beta-carotene, vitamin E, selenium, and multivitamins/minerals)
What this could lead to
If successful, this study could clarify whether taking certain vitamins and minerals can reduce the risk of esophageal and stomach cancer over the long term.
What could go wrong
This is a follow-up observational study, not a new treatment trial. The original intervention ended in 1991, so any benefits may have faded, and results may not apply to other populations.
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.