Hi Doctor, My recent TSH value reads 0.5miu/L, is it normal range or it is below, lab assistant told that it is low, I want to understand the reason, and risk of it, Planning to consult physician very soon.. I feel lyk my head is heavy all the time and feels low energy in my body especially in my arms and legs.. Is it bcz of low TSH value.. Please letme know, and what all the things do I need to discuss when I consult physician..