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.
What happens if the patientâs T4 and TSH levels drop while on T3 therapy? A decrease in TSH and T4 levels is exactly what one would expect in a patient receiving exogenous T3 therapy. In fact, the resetting phenomenon (p48) is often not seen unless there is a decrease in T4 levels for a time.