They work by promoting the body's natural healing processes: BPC-157 : Enhances angiogenesis (formation of new blood vessels), which improves blood flow to damaged tissues, accelerating healing
In this article Growth hormone injections come in different forms

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As for the pill - I have not had a good experience myself - it just did not do good things for my body, however I have heard in younger women it does marvels for regulating periods - so am surprised you are getting intermittent bleeding - worth another poke at the docs perhaps