A large-scale survey report on whether vitamin D is fighting cancer was recently published (2018-7-19) in the American Medical Association Cancer Journal (JAMA Oncology). Its main title is Monthly High-Dose Vitamin D Supplementation and Cancer Risk, and its subtitle is A Post Hoc Analysis of the Vitamin D Assessment Randomized Clinical Trial.
This survey was led by a team of Oklan University in New Zealand, while other researchers participated came from the three departments of Harvard University, Otago University in New Zealand, and Harvard University.
The subject of the survey was 5,108 residents in the Oklan area of New Zealand. Their average age is 66 years old (50 to 84 years old), with males accounting for 58%. They were randomly assigned to two groups between April 5 and November 6, 2012, one group (2558 people) took Vitamin D supplements and the other group (2550 people) took comfort drugs. Neither the investigator nor the investigator knew who took the vitamin D supplement, which is the so-called double-blind trial.
Vitamin D supplement dose was the first monthly 200,000 unit, followed by 100,000 units per month, for a total of 2.5 to 4.2 years (average 3.3 years).
Blood tests showed that the blood concentration of vitamin D in people who took vitamin D supplements was between 48 ng/ml and 54 ng/ml, and the value was more than 20 ng/ml higher than that of people who took comfort drugs.
As for whether the person being investigated has cancer, it is based on the health data of the people across the country maintained by the Ministry of Health of New Zealand. The result of this cancer data to resolve the blindness was that at the end of the 2015-12-31 survey, a total of 328 people with cancer were in all 5,108 people under investigation, and 165 of them were taking Vitamin D supplements, and the other 163 were taking the comfort agent. In other words, taking vitamin D supplements did not reduce cancer risks.
results are consistent with most surveys of past identity. Please read "Vitamin D Fight Cancer? Scientific Certification.
Original text: Vitamin D fights cancer, the latest large-scale investigation