Does l-tyrosine help with hypothyroidism?

No: You may be referring to , however, levothyroxine which is the treatment for hypothyroidism. L-tyrosine is an Amino Acid which the body uses to make proteins.

Yes, if deficient: Our bodies produce thyroid hormone by combining tyrosine with iodine. Thus, if one is deficient in tyrosine it might cause hypothyroidism. Our body synthesizes tyrosine from phenylalanine, so that deficiency (which is not unusual) can also cause hypothyroidism. If low in tyrosine then supplementing should help: http://ezinearticles.Com/?The-importance-of-l-tyrosine-in-thyroid-function;id=4717866.