Rumour: Taking vitamin D can help with asthma.

Truth: This is true. According to a review study, vitamin D can effectively reduce the rate of asthma attacks that require systemic corticosteroids from 0.44 attacks to 0.2 attacks per year. As well, vitamin D has been shown to reduce the rate of having at least one exacerbation requiring emergency department visits. Read more about vitamin D’s impact on asthma here.

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