re: What’s the best legal supplement for lean muscle growth?

The best by far is going to be the only steroids still not on the controlled substance list which is methyl Sten and dmz. Darkside labz is the only one with the balls to well it openly with both of the steroids in there as super dmz. Super strong especially considering it's two steroids in particular with the strongest ban steroids.

super dmz

After that it would be sarms or 11x depending on your goals. For straight muscle building it's hard to beat mk777.

As far as combining any of this with trt, well that will help because you won't get a post cycle crash.

Now the super dmz is going to require a strong pct unless on trt consisting of two serms. Osta and lgd will also require a pct but really only need one serm. Serm equals clomid or nolvadex or tormifene

Sarms are selective androgen receptor modulator. They bind to the androgen receptor and express anabolics and androgenic effects to different levels depending on the one used. I believe without looking lgd is considered an actual steroid though. Anyways sarms were developed to provide steroid effects with the sides but didn't work out that away. They are much weaker and still cause some range of shutdown, atleast the ones I mentioned.

Gw is great for endurance and cholesterol but do not take more than 20mg a day. High doses equivalent to 76mg a day caused cancer in rats.

Ma supps has good mk677. After that prolly have to go grey market for the sarms.