Vitamin D Test
The Vitamin D Test measures levels of vitamin D, a key nutrient for bone strength and overall health. Your body produces vitamin D after exposure to sunlight or from consuming certain foods and supplements. Because it enables your body to absorb calcium, vitamin D is essential for healthy bones and also helps the immune system fight infections.
This test may be right for those who:
Have a diet low in vitamin D rich foods such as egg yolks, fish such as herring, mackerel, and salmon, liver and organ meats, Vitamin D-fortified milk, orange juice, and cereals, and dairy products such as yogurt and cheese
Have low exposure to sunlight
Have a darker skin complexion
Are overweight or obese
Abnormal vitamin D levels may have no symptoms, and some people can have abnormal vitamin D levels for years without knowing it. Some symptoms of low vitamin D levels include depression, fatigue, joint or muscle pain, and weakness. Low vitamin D levels can also affect organs and body functions including bone health, metabolism, heart health, and immune health.
The Vitamin D Test does not require fasting.