Question

People who live above the arctic circle (northern areas of: Alaska, Canada, Norway, Finland, Sweden, and Russia) will experience several months of complete darkness in the winter months. Obviously, these people are not getting any UVB from sunlight! However, most people who live in these areas either have a diet rich in fish or a culture of taking of fish-oil supplement pills. Explain why.

Answer 1

People who live above the arctic circle (northern areas of Alaska, Canada, Norway, Finland, Sweden, and Russia) will experience several months of complete darkness in the winter months.

Obviously, these people are not getting any UVB from sunlight.

It's putting them at risk of Vitamin D deficiency because the main source of Vitamin D is sunlight. When human skin is exposed to Ultraviolet B rays of sunlight then cholesterol in our skin starts to synthesize Vitamin D, So people who live above arctic circle are more prone to suffer from Vitamin D deficiency.

Vitamin D is very necessary for bone health, muscle health, and heart health. So people from the above arctic circle have a diet rich in fish or culture of taking fish oil supplement pills to fulfill their Vitamin D requirement because fish and fish oil supplement reach in Vitamin D.