http://www.superpeptides.com/
It's a bit more pricey than other sites (mostly because they sell 60ml of Letrozole for example as opposed to 30ml) but it's the only peptide company endorsed by gh15.org and gh15 himself. These peptides are actually American made and tested instead of being obtained in China, mixed up, and labeled as American made and tested. Unlike some other peptides companies, they are completely legal because they aren't selling anything questionable nor are they selling any controlled substances.
You don't want to use Melanotan I. It's an inferior product. That's why Melanotan II came about.
Find your weight on the chart below. 10mg of Melanotan II (1 vial) is the average amount of one cycle. About 3 cycles are needed for the "loading phase." For someone of average weight (140-175), around 30mg is needed. This amount will vary from person to person. Heavier people, and skin type 1's need more than lighter people and those with higher skin types.
10 mg / 12.00 injections = 0.833 mg --- 42 kg = 92 lbs @0.02mg/kg
10 mg / 11.50 injections = 0.870 mg --- 43 kg = 96 lbs @0.02mg/kg
10 mg / 11.00 injections = 0.909 mg --- 45 kg = 100 lbs @0.02mg/kg
10 mg / 10.50 injections = 0.952 mg --- 48 kg = 105 lbs @0.02mg/kg
10 mg / 10.00 injections = 1.000 mg --- 50 kg = 110 lbs @0.02mg/kg
10 mg / 9.50 injections = 1.053 mg --- 53 kg = 116 lbs @0.02mg/kg
10 mg / 9.00 injections = 1.111 mg --- 55 kg = 122 lbs @0.02mg/kg
10 mg / 8.50 injections = 1.176 mg --- 59 kg = 130 lbs @0.02mg/kg
10 mg / 8.00 injections = 1.250 mg --- 63 kg = 138 lbs @0.02mg/kg
10 mg / 7.50 injections = 1.333 mg --- 67 kg = 147 lbs @0.02mg/kg
10 mg / 7.00 injections = 1.429 mg --- 71 kg = 157 lbs @0.02mg/kg
10 mg / 6.75 injections = 1.481 mg --- 74 kg = 163 lbs @0.02mg/kg
10 mg / 6.50 injections = 1.538 mg --- 77 kg = 170 lbs @0.02mg/kg
10 mg / 6.25 injections = 1.600 mg --- 80 kg = 176 lbs @0.02mg/kg
10 mg / 6.00 injections = 1.667 mg --- 83 kg = 184 lbs @0.02mg/kg
10 mg / 5.75 injections = 1.739 mg --- 87 kg = 192 lbs @0.02mg/kg
10 mg / 5.50 injections = 1.818 mg --- 91 kg = 200 lbs @0.02mg/kg
10 mg / 5.25 injections = 1.905 mg --- 95 kg = 210 lbs @0.02mg/kg
10 mg / 5.00 injections = 2.000 mg --- 100 kg = 220 lbs @0.02mg/kg
10 mg / 4.75 injections = 2.105 mg --- 105 kg = 232 lbs @0.02mg/kg
10 mg / 4.50 injections = 2.222 mg --- 111 kg = 245 lbs @0.02mg/kg
10 mg / 4.25 injections = 2.353 mg --- 118 kg = 259 lbs @0.02mg/kg
10 mg / 4.00 injections = 2.500 mg --- 125 kg = 276 lbs @0.02mg/kg
For example, someone weighing 184 lbs should be taking a dose of 1.66667mg daily. They will be able to get this amount out of the vial 6 times ( 10 / 1.66667 = 6)
Many people have began to emulate the slow-release method by giving themselves multiple injections daily. For example, that 184 lb. person would take 2 injections (1 morning / 1 night) of about .8333mg.