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"Vitamin C may lower stroke risk"

Vancouver Sun

Source: Vancouver Sun

Published: 23 Jan 2022

Category: Other

Rating: (1½ stars)

what they said (Hover the mouse cursor over underlined words for more info)

NEW YORK -- A person's level of vitamin C may predict his or her likelihood of having a stroke, according to a long-term study of some 20,000 middle-aged and older residents of Norfolk in the United Kingdom.
During an average follow-up of 9.5 years, 448 strokes occurred in the study population. Researchers found that people with the highest vitamin C concentration at the start of the study had a 42-per-cent lower risk of stroke over 10 years compared to those with the lowest levels of vitamin C....

how did it rate? (more information)

Criteria Rating
Total Score 2 of 8
Availability of Treatment Not Applicable
Novelty of Treatment Satisfactory (?)
Disease Mongering Satisfactory (?)
Treatment Options Not Satisfactory (?)
Costs of Treatment Not Satisfactory (?)
Evidence Not Satisfactory (?)
Quantification of Benefits of Treatment Not Satisfactory (?)
Harms of Treatment Not Satisfactory (?)
Sources of Information Not Satisfactory (?)
Relies on Press Release Not Applicable
Quantification of harms of treatment Not Applicable

what we said (Hover the mouse cursor over underlined words for more info)

This story reports a cohort study of 20,000 residents in the UK who were followed for almost 10 years and found that those with the highest levels of vitamin C had the lowest levels of stroke. The study found a 42% lower risk of stroke in the higher Vitamin C patients, but we don't know what this means in absolute terms. It is possible that there is a protective effect of Vitamin C, but it is also possible there is something fundamentally different between people who consume food high in vitamin C and those who do not. While such a study is hypothesis-generating, it is not definitive in terms of the benefit of vitamin C reducing stroke risk. Finding out if it is possible to have too much Vitamin C (and whether there any side effects related to Vitamin C intake, may be useful in such an article.

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