You are right, choosing a brand of human growth hormones can be difficult. I recommend paying attention to the country of manufacture. For example, GenSci (the manufacturer of Jintropin) and AnkeBio (the manufacturer of Ansomone) have a good reputation. Check that the manufacturer's website has information about the authentication of the product. This is important, as there are many fakes on the market. The prices of growth hormones can vary greatly, and a higher price does not always mean better quality. I always read reviews on forums to see what other users think of a particular brand. Make sure you choose a product with positive reviews. You can start by looking at https://www.ecbt.org/, there is some useful information there.

Also, I recommend paying attention to the dosage you are getting for your money. I would always recommend buying from reputable suppliers to avoid problems.