C and D on the FDA 2877 and insert the word or  between the Affirmations. Note: The U.S. Customs Service will treat this entry as a. D Declaration for purposes of duty. Such requests must be made on the FDA 766; include Items 1, 2, and 3 under Declaration C, a. statement of the need to use the option C or D Declaration, a statement of how the product(s) will be brought into compliance and the.
There are 2 reasons that could be the cause behind your low TSH: 1  Your glands simply aren't producing enough;  Your thyroid gland is producing too much of the thyroid hormone which signals to your brain to stop producing anymore.
- TSH goes up when thyroid function is low (TSH stands for Thyroid Stimulating Hormone). - Your thyroid makes T1, T2, T3 and T4 but your mainstream doc will probably only check TSH, and maybe free T4.- T3 is 4-fold more potent than T4, because T3 is the active form of thyroid hormone. TSH goes up when thyroid function is low (TSH stands for Thyroid Stimulating Hormone). - Your thyroid makes T1, T2, T3 and T4 but your mainstream doc will probably only check TSH, and maybe free T4.