What is the situation regarding vitamin D supply?

In several countries, vitamin D is supplied to people via the food industry. These include the USA, Canada, and Finland. A similar concept is known from iodized table salt.

What is the current state of vitamin D supply in the population? When is supplementation advisable? Who is at risk of vitamin D deficiency? What role does all this play in everyday practice? An online survey conducted by Ärzte Zeitung aims to shed light on these questions.

Today we are discussing how vitamin D supply is assessed.

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