During growth hormone therapy, which timing is most effective for administration?

• A. Morning
• B. Afternoon
• C. With meals
• D. Nighttime

Answer: (D)

The main idea is to match therapy timing to how growth hormone naturally acts in the body. Growth hormone has a strong, pulsatile release that peaks during sleep, especially at night. Giving the hormone at night takes advantage of that natural nocturnal pulse, letting the injected dose contribute to the body’s largest surge and promoting better growth and tissue effects. If you give it in the morning or afternoon, you miss that big nighttime peak and the overall growth response is not as strong. Administering with meals isn’t ideal because meals raise insulin and glucose levels, which can influence the hormonal environment and make the timing less predictable; nighttime dosing avoids those daytime fluctuations and aligns with the body’s physiologic pattern.