Oh, so you're looking from an anabolic standpoint. There are numerous theories that low dose T3 and various doses of T4 are anabolic. I have used T2 in doses up to 1,200 mcg/day, which I do not suggest is smart or recommend to anyone following this thread, but the effects were pretty worthless IMO. I've used T2 off and on since 2000. I really wanted to believe it was a worthwhile product, so much that at one point I bought something like 18 bottles of a T2 only product back in the early 2000's after lipokinetix was pulled because I thought T2 was going to be pulled too. After many years of using it and wanting to believe, I had to accept the fact that aliens are not visiting this planet.
Others on here swear it works, and you can give it a go if you like of course, but IMO I'd low dose T3. Many people suggest the increased protein turnover/synthesis with lower dose T3 (12-25mcg) helps with muscle building.
This is just my 0.02 though. Like I said, others on here will disagree and it isn't any particular brand I am saying doesn't work - it's the ingredient itself. I know there are studies too, but in mice.