Ive not noticed hair loss but mines very thin,Ive never had thick hair but it is alot thinner than it was a few years ago, Im now on 150mcg of levothyroxine (which I didnt know was the same as Synthroid) and havent noticed any change although I did notice when I wash my hair theres a bit more than the normal amount in the brush after.

Hypothyroid has caused a ton of thining for me including eyebrow loss. The sythroid does not cause hair loss. I go through some periods when I lose a ton. I just started taking suplements a couple of months ago and do see a difference. I did major research on the internet and I found that most w/ hypo have low iron and that is a major contributor to the hair loss.
this is my daily regimine.

160mg Iron-Slow Fe(to reduce constipation)
1200 Biotin
Evening Primrose
Vitamin E
B Complex
Daily womens w/ folic acid
High protein diet

Good luck

Ive experienced it in both Hyper and Hypo states

I have had this problem and have been in tears over it .
My Dermotologist told me to use Mens Rogaine foam. It doesnt help it grow back faster but it will stop it frm falling out . It did work! I also dont wash my hair as much. When I do wash my hair I use Nioxin Shamp Cond An scalp treatment (which is ok to use when your using Rogaine) You can but this at a beauty supply like Harmons. They do have a websit Nioxin.com (ppl that have lost hair from medical problems had suggested this to me its also vry good)
Also for Vitmins Biotin is vry good for your hair (ask ur doc0 Ive also been looking into Evening Primrose Oil It was in the book living Well with Graves also helps subside the hair loss ...Also for the Straw like feeling use Cholestrol Treatment and infusium leave in conditionor both can be bought at CVS
I Hope this helps u

Yes, I lose an enormous amount of hear daily. In fact its everywhere I look. Today I washed my hair and filled the basin when I combed it over the basin (have to because of the amount I lose). Glass hair is a term used to describe hair that is brittle and brakes. This can happen as well as just outright loss.

I have experienced some hair loss, but the thing that I have most noticed is losing my eyelashes. Really upsetting. I have been on Synthroid for alomst 2 months now, and the hair loss doesn't seem to be getting better. I think I will try the regimine Suzanne listed. Thanks Suzanne!

Yes, I have the same problem..my hair is always falling out...it's also alot duller than usual...I have been on Synthroid for over 5 years and it hasn't helped with my hair growing back much..although, I do also have Polycystic Ovaries and hormone problems so that may be to blame too

I sympathize. I think I lose more hair in the late summer/early fall and then some grows back - this surmised by wathcing the ebbs and flows of the hairline on my forehead.
I lose a ton of hair. I too, use Nioxin - makes it look fuller.

I hope so!!! Im new to this and my hair is horrible now.

This happened to me also. My hair finally is "healthly" again. It is a slow process, but mine did grow back. I know it doesn't help when it is happening to you.

I was almost ready to cut it again..but holding off. Ive cut my hair twice in last 6 months...it was mid back length now its shoulder. Afraid if I cut again its really going to look thin.

I have been on synthroid for 16 years. I have had hair loss the entire time. My hair still breaks and is so fine. Some days I will find quarter size bald spots. It never really gets better I am afraid. I have noticed that If I keep it shorter....it is at least a little fuller.

I try to focus on the positive...Hey..In the summer, I do not have all that hair to make me hot. lol