What are DHT levels and how can I test the levels?

Dihydrotestosterone. Dht is one of two metabolites of testosterone (estradiol is the other). You can easily check for both via simple blood draw. Reference ranges will vary depending upon lab & equipment used, therefore specific test ordered. High Dht is associated w/hair loss & enlarged prostate. We can lower Dht w/5ari, eg Finasteride & dutasteride, but might increase Estradiol (think seesaw effect). So check both.