-People who do not expose their skin to sunlight
-People with dark skin
-People who are obese
-People with medical conditions that affect how the body controls vitamin levels (for example, liver or kidney problems) or who take medications that interfere with vitamin D metabolism (like anticonvulsants)
-Exclusively breastfed infants who are always shielded from sunlight or with mothers with at least one of the above risk factors
-Testing for vitamin D status is advised for people who are at risk of vitamin D deficiency.
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