My guess would be the firm providing the DHT would have mixing instructions and possibly recommended dosage information for the compounding lab. I would start with the compounding lab and if they don't know, move on to the manufacture. Pure DHT would be extremely potent so even the compounding lab would have to receive it somewhat diluted to make mixing easy. This would require a fair amount of communication at that level. In addition, the compounding lab is most likely producing it for others so if nothing else, another doctor could be contacted for information. I don't know where the answer is but I suspect if you are pushy enough somebody will have an answer.
