Many on this forum recommend younger men to begin using testosterone and growth hormones. As a nurse, I've witnessed some men using high doses from an early age into their 30s. However, it's important to note that this can significantly impact male fertility. I've seen cases where individuals are shocked when they face difficulties starting a family. Some experience moderate impacts on sperm production/quality, while others require costly fertility treatments for success. It's crucial to be aware of these potential consequences, as they can have a profound impact on your life and future relationships.