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Not everyone can afford getting half naked under the sun on a daily basis. It's easier to be deficient than you think. Do a blood test. You may get an unpleasan

• valarauko 6y ago
  It really depends on what counts as insufficient. There is enough debate in the scientific literature on what constitutes a "sufficient" level of Vit D for most healthy adults. If we set the sufficiency level of 25(OH)D of 20 ng/mL (50 nmol/L), most of the world's adult population would be in the healthy range. These levels can be achieved in a healthy Caucasian adult in a northern latitude in summer (eg, Edinburgh, Scotland) with as little as, say, two sessions of 10 minutes each in a week, exposing just the arms and legs. Serum levels of Vitamin D also do not plummet with the winter months - it's more of a slow dip, and the seasonal low levels do not seem to negatively effect most adults.