DHT blockers like dutasteride and finasteride will work to reduce conversion of test to DHT. These drugs will not work the same for other steroids though. If you use Dbol, your hair line will still be at risk. In some cases like with Deca, hair loss will be increased since the Deca will not be broken down into more hair friendly metabolites. If you use test only, these DHT blockers will help. Also be aware that DHT is not all bad. Many people are experienceng long term sexual dysfunction after using DHT blockers. So weigh out the pros and cons before jumping in.