/u/Ashen_canid your husband doesn’t have to get testosterone through shots. Testosterone comes in salves and other forms as well. He should find a doctor who has sympathy for alternative treatments. That way he can try a particular herb and get blood tests to see if it actually raises his testosterone levels. If you two find things proven by medical tests to work you can post your anecdotal accounts here for the rest of us. This subreddit tends to be biased towards women’s issues outside of general herbalism. There are many people who participate in /r/herbalism who do not know what they are talking about and who will talk about it anyway, with confidence. Do yourself a favor and talk to a professional herbalist. These days with telemeetings it should not matter if there is one in your area or not.