Vitamin B12 and D deficiency are a very common cause of feeling exhausted even after a full night's sleep, and with your
thyroid normal, these two are likely driving most of your tiredness right now.
Next Steps
Correcting your
B12 and D levels as your doctor advises usually improves energy over 6 to 8 weeks. Getting your iron levels and a
complete blood count checked is also worth doing, since low iron causes similar fatigue.
Health Tips
See a physician if the exhaustion doesn't ease once these levels improve, or if you notice weight changes, hair fall or low mood alongside it.