Do you really need vitamin D? Signs and sources

Why it matters

Vitamin D helps your body absorb calcium and supports your immune system.

Common signs of low levels

• Tiredness that does not go away
• Aching bones or back
• Getting sick often

Where to get it

Morning sunlight for 15–20 minutes, oily fish, eggs and fortified milk. A supplement can help — ask your doctor for a blood test first.