1,4,6 etiollochan-dione, 3, 17-keto-etiochol-triene, androst-1,4,6-triene-3,17-dione and many others names all refer to CAS# 633-35-2 or better known as ATD (androsta-1,4,6-triene-dione) is the strongest AI on the market and, unfortunately, it is often dosed higher than necessary in most products since it is a very strong AI that should be respected for its downsides, which can be excessive. This product seems to boost testosterone above levels of other products, but that can certainly be misleading since the product can throw off blood tests for testosterone in some cases. This AI, used in the proper amounts, can have real benefit. But, when dosed too high, like in many products (over about 20mg per day), it can cause some loss of sex drive due to its binding to the androgen receptor in the brain. This ingredient is often promoted to “increase wood” but actually it has the opposite effect in doses above a certain threshold. ATD has a place in AI’s at very low levels and it a good product combined with other estrogen control products. ATD can cause a positive test for the anabolic steroid Boldenone and the prohormone Boldione, making it a bad choice for people who get drug tested. ATD certainly is a great ingredient to include as part of your post cycle therapy or alone to boost testosterone. The major drawback to this steroidal aromatase inhibitor is that it can blunt sex drive (which is the opposite of how it’s advertised).