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.
Types of Hypothyroidism. Primary hypothyroidism is characterized by low levels of T3 and T4 even when TSH levels are normal. It is caused by damage to the thyroid gland and accounts for most cases of hypothyroidism. Secondary hypothyroidism, on the other hand, is caused by low production of TSH in the pituitary gland.