I have posted a similar thread, that was regarding 3 alpha HSD enzyme which is increased by administration of Broccoli's active ingredient "Sulphoraphane", That perticular enzyme is responsible for degradation of DHT to its metabolites, there is a theory that balding scalps may lack in 3 alpha HSD activity which leads to DHT accumulation hence baldness.
https://www.ncbi.nlm.nih.gov/pubmed/26923074 read this study.
i also want to try this but unable to get sulphoraphane in my country. if you want to try, this supplement is the best
https://www.amazon.com/Thorne-Research-Crucera-SGS-Sulforaphane-Glucosinolate/dp/B004FUHIJM
crush some pills and make a topical at least use 1% concentration and increase it.