What vitamin d is and why measure it: vitamin d, in particular the form 25-hydroxyvitamin d 25 oh d , is essential for calcium absorption and bone health, for muscle function, for immune defenses and for the prevention of some chronic diseases. Una deficiency can cause fatigue, muscle pain, fragile bones, osteoporosis or rickets in children, as well as increasing the risk of infections or autoimmune disorders. How the vitamin d self-test works: a rapid home test that evaluates whether the vitamin d concentration is sufficient or deficient. It does not provide a precise numerical value but a qualitative indication. It is based on a small capillary blood sample and returns the result in about 10-15 minutes. Indicative reference values: less than 20 ng ml deficiency between 20 and 30 ng ml insufficiency between 30 and 50 ng ml optimal level above 100 ng ml possible excess or toxicity from overdose when to do it: in months with low sun exposure winter and early primavera in the case of a diet low in foods containing vitamin d or a vegan diet in the presence of deficiency symptoms fatigue, pain, bone fragility during pregnancy or breastfeeding if taking supplements and you want to monitor effectiveness advantages: easy to use and non-invasive does not require a medical prescription provides rapid indications on vitamin d status useful as a preliminary screening before any clinical analyses limitations: it is a qualitative, non-diagnostic test in the case of an abnormal result,...
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