Because your hair follicles basically operate on a multiple-month growth>maintenance>hibernation cycle, it can take as long as 6 months for your hair to start recovering from hypothyroid-related thinning and breakage.

Bascially, only some of your hair follicles at any time are actively growing hair. Other follicles are "maintaining" a hair strand, but not actively growing anymore. And the rest are dormant: Just sitting there, not doing anything at all..

Once your medication is properly adjusted, the then-dormant group of follicles will start producing healthier hair when they enter their next active growth cycle, but the portion of follicles now in their active-growth cycle will only be producing good *roots* for the weakened hair strands they've been growing up to that point, and the follicles in their "maintenance" cycle will need to shed their current hair strands, go through their dormant phase, and then cycle back to their active growth phase before they start producing healthy hair.

So, yes, in short ... it can take months for your hair to start to show an improvement. And I'm not sure there's anything you can really do about it.

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