I personally say people should just take 1-test instead of combining the two. 1-ad converts to 1-test in the liver and 1-test doesn't aromatise. The problem is that the 1-ad can convert back to DHT and that can cause some problems, but in such low amounts, not too many problems at all. The 4-ad is the same thing, it's just supposed to be more effective because it's not supposed to be able to be converted back to DHT.

I don't see any chemical reason that you should combine the two.

Just keep in mind that 4-ad and I believe 1-ad only increases test levels for a couple hours. The directions should say to take it half an hour before you workout. If they both say that, then they both only stay in the body for a couple hours.

And it's not a bad question. A lot of people on here don't really know a lot about prohormones. We just mainly go by what advertisers say and try to figure things out for ourselves. Even though I try to give scientific info, most scientific info is done invitro (in a test-tube), and things can be different in real life.

Good luck.