How hgh supplements work human growth hormone , also called somatotropin , is a protein hormone of amino . Frequently asked questions where should i store my hgh products ? while products are very stable , we mend that you keep them ( and all supplements ) away from extreme heat or .

Based on the preceding passage, choose your answer for question Why should the products be kept away from extreme heat ?
OPTIONS:
I. Because somatotropin is a protein hormone of amino .
II. Because extreme heat may cause damage to the products .
III. Because they are human growth hormones .
IV. Because they are also called somatotropin .
The answer is:
II.