| http://www.w3.org/ns/prov#value | - If your levels are this low there may be symptoms such as bone pain, deformities such as rickets, and seizures.In winter many people are likely to have levels between 25 and 50 nmol/l which is categorised as insufficiency and requires long-term supplementation.According to Dr Holick: ???No one, unless they are a lifeguard or sun worshipper, will have a blood level above 50 unless they take supplem
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