Favoring one amino acid can lead to deficiencies in other amino acids. You can park on the US side of the Mexican border for free. As you get off at the last exit, you make a left and cross over the interstate. So I had to cut back. On top of that is the cost of blood tests and the physician to interpret them.
Some people just get the prescription and blood work from their family physician.
There are options to get the blood test on you own. Humatrope comes in two vials. After you mix the two, you must use it within two weeks. Currently, I've been trying 1.33 IU once per day for three days with the forth day off. If that 12 hours isn't enough, the fourth day off should cover it.