Vitamin D deficiency can silently affect well-being and for many, symptoms are often not noticeable in the beginning, till they start affecting the daily routine. According to the National Institutes of Health, around 1 in 4 US adults are deficient in this sunshine Vitamin.
While many are aware of the recommended daily allowance of Vitamin D which is 600 IUs in adults and 800 IUs for people over 70, maintaining the ideal levels is not always easy. Even exposure to sunlight and having Vitamin D-rich foods may not at times suffice. People often take a supplement, but without the doctor's advice, there is always a risk of overdosing which can lead to undesirable Vitamin D toxicity symptoms.
