Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice.
I can understand why you would be concerned about losing your hair and am concerned about your nutritional status and the adequacy of your
thyroid replacement regiment.
There are many things that can cause loss of hair such as you describe besides getting older. A vitamin D deficiency can cause such a loss as can insufficient thyroid replacement
hormone therapy or inadequate
selenium to convert the
Synthroid pill that you are probably on to the active T3 thyroid hormone. Low iron can cause hair loss.
My advice to you is to get your vitamin D level checked and to take a supplement with the daily value of iodine and selenium in it. Have your
hemoglobin AND your iron levels checked. Assure that you are eating 1-1.2 grams of protein per kg of body weight per day (a kg is 2.2 lbs). A
low protein diet may cause hair loss. I would also advise an
omega-3 supplement or to increase your dietary intake of fish, seafood, seaweed products and to avoid soy which may interfere with your thyroid replacement therapy.
I hope I have given you some ideas to pursue on the potential causes of your hair loss and it is my wish that you find relief once again in glowing locks of hair that remain on your head!
Hope I have answered your query. Let me know if I can assist you further.