While a lot of us dismiss tiredness, fatigue, and brain fog as usual parts of a busy day, these symptoms, more often than not, signal a hidden deficiency. While most of us would naturally gravitate towards an iron deficiency, the fact of the matter is that a simple ‘serum iron’ test is pretty unreliable when it comes to gauging overall health. So what should one do?Dr. Sudhir Kumar, a leading neurologist, in a recent tweet, explained that many standard medical tests often miss a hidden deficiency. This...