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.
1 When the hormone levels are low, the brain sends a message to send out TSH. 2  This causes the thyroid gland to send out more hormones. 3  If blood levels of thyroid hormone are high, the brain senses this and sends a message to stop producing TSH. 4  TSH is a very good test to check for hypothyroidism. The brain regulates the amount of thyroid hormones in the blood. 2  When the hormone levels are low, the brain sends a message to send out TSH. 3  This causes the thyroid gland to send out more hormones. 4  If blood levels of thyroid hormone are high, the brain senses this and sends a message to stop producing TSH.