Vitamin C: Separating Fact from Flu-Fighting Fad
When it comes to keeping your immune system in top shape, vitamin C is often touted as the go-to supplement. However, a closer look at the science reveals that this popular remedy may be nothing more than a cold comfort.
The notion that taking high doses of vitamin C can prevent or alleviate cold symptoms has been around for decades, largely thanks to the influence of Linus Pauling, a Nobel Prize-winning chemist who championed the benefits of vitamin C in his 1970 book Vitamin C and the Common Cold. But what does the evidence really say?
According to experts, including Dr Daniel M Davis, head of life sciences at Imperial College London, the idea that vitamin C can ward off colds is a myth with no scientific basis. "Research shows that people who take vitamin C supplements are just as likely to catch a cold as those who don't," he notes. While supplementation may have a modest impact on symptom duration – about 8% in adults – this effect is hardly impressive.
The problem with relying on vitamin C to keep the sniffles at bay is that people who regularly take high doses of the supplement are often more health-conscious overall. This means that any potential benefits from taking vitamin C may be outweighed by other factors, such as a healthier diet and lifestyle.
So what's the best bet for boosting your immune system? Vitamin D, says Dr Davis, is the clear winner. It's much more clearly established as an important player in immune health, and can be easily boosted through exposure to sunlight or supplements – especially during winter months when our levels tend to drop. "Vitamin D is a more reliable way to support your immune system," he advises.
In short, while vitamin C may have its benefits, it's not the cold-fighting superpower we've been led to believe.
When it comes to keeping your immune system in top shape, vitamin C is often touted as the go-to supplement. However, a closer look at the science reveals that this popular remedy may be nothing more than a cold comfort.
The notion that taking high doses of vitamin C can prevent or alleviate cold symptoms has been around for decades, largely thanks to the influence of Linus Pauling, a Nobel Prize-winning chemist who championed the benefits of vitamin C in his 1970 book Vitamin C and the Common Cold. But what does the evidence really say?
According to experts, including Dr Daniel M Davis, head of life sciences at Imperial College London, the idea that vitamin C can ward off colds is a myth with no scientific basis. "Research shows that people who take vitamin C supplements are just as likely to catch a cold as those who don't," he notes. While supplementation may have a modest impact on symptom duration – about 8% in adults – this effect is hardly impressive.
The problem with relying on vitamin C to keep the sniffles at bay is that people who regularly take high doses of the supplement are often more health-conscious overall. This means that any potential benefits from taking vitamin C may be outweighed by other factors, such as a healthier diet and lifestyle.
So what's the best bet for boosting your immune system? Vitamin D, says Dr Davis, is the clear winner. It's much more clearly established as an important player in immune health, and can be easily boosted through exposure to sunlight or supplements – especially during winter months when our levels tend to drop. "Vitamin D is a more reliable way to support your immune system," he advises.
In short, while vitamin C may have its benefits, it's not the cold-fighting superpower we've been led to believe.