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Can vitamin and mineral supplements cause cancer?
"Daily vitamin and mineral supplementation can reduce the overall cancer incidence of middle-aged and elderly men by 8%, which is a landmark study."

—— Professor Yu Kang, Chief Physician of Clinical Nutrition Department of Peking Union Medical College Hospital

At the 1 1 American Society for Cancer Research (ACCR) "Frontier Research on Cancer Prevention" held in Anaheim, USA from June 20 12 to June 20 16/October, the latest research results of multivitamin and mineral supplements and cancer prevention-doctor were published. PHSII study found that multivitamins and minerals supplementation can reduce the overall cancer incidence of middle-aged and elderly men by 8%, and at the same time reduce the cancer incidence of people with cancer history, with statistical differences (P

The PHSII research was conducted by researchers from the Department of Preventive Medicine of Brigham and Women's Hospital affiliated to Harvard Medical School, and sponsored by the National Institutes of Health (NIH). In the study, the relationship between multivitamins and minerals and cancer began from 1997 to 20 1 1 year, and the median intervention time was 1 1.2 years. The study design adopts a randomized, double-blind, placebo-controlled method to follow up14,641American healthy male doctors aged 50 and above. PHSII is the only randomized clinical trial to evaluate the long-term health benefits of multivitamins and minerals.

Dr. JohnMichaelGaziano, director of geriatrics at Brigham and Women's Hospital affiliated to Harvard University, said, "At present, more than half of people in the United States take vitamin supplements every day, and the most common thing is to supplement multivitamins and minerals. However, in the past, we lacked long-term intervention trials to evaluate the health benefits of daily vitamin supplements. "

"In China, a very large proportion of people also take multivitamins and minerals every day, but at present we still lack reliable research and professional data to judge the specific health benefits of long-term vitamin and mineral supplementation." Professor Yu Kang agreed with the above view and added: "This is a landmark study, which shows that a comprehensive formula supplemented with multiple vitamins and minerals can bring clear health benefits to consumers, such as reducing the overall incidence of cancer and reducing the incidence of cancer in people with a history of cancer. This is consistent with the results of nutrition intervention test in Linxian County, China. At the end of the trial intervention in Linxian County, the results of both trials showed that supplementing multiple micronutrients was of positive significance for preventing cancer. "

It is worth mentioning that all kinds of vitamin and mineral products used in PHSII research during 1 1 were provided by Pfizer Health Medicine Department (PCH). All 14 and 64 1 subjects in the intervention group took a tablet of xiancun silver every day, while the control group took the corresponding placebo instead. After 1 1.2 years of multi-vitamin and mineral intervention, the cancer incidence of Xiancunyin tablet group was 8% lower than that of placebo group, and the results were statistically different (HR = 0.9295% chlorine, 0.86-0.998; P=0.04), and for people with a history of cancer, good silver tablets can also reduce the incidence of cancer, and the results are also statistically different (HR = 0.7395%Cl, 0.56-0.96; p=0.02)。

Professor Yu Kang also mentioned: "The results of the investigation on the nutritional status of China residents in 2002 showed that there were still some problems to be solved urgently in China, such as the serious deficiency of calcium and vitamin A intake. The survey results show that the daily intake of calcium per person is 389 mg, 439 mg in urban areas and 370 mg in rural areas, which is only half of the required amount. And vitamins only reach 60%-70% of the required amount. Due to the lack of micronutrients, the prevalence of anemia in the elderly over 60 years old is 32.2%. The formula of the multivitamin preparation used in the study (namely, Shancunyin tablets) is a nutrient supplement based on the recommended daily nutrient intake. The value of this experiment also lies in the relatively low amount of nutritional intervention. This shows that the overall decline in the incidence of cancer found in the study is due to the comprehensive daily formula of various vitamin and mineral supplements, which has great reference significance for consumers in China. "