I have been running thymosin alpha-1 for six weeks and the honest summary is that the effect is smaller than the internet suggests and real.

If you need three other compounds to notice the first one, you have not tested the first one.

Tolerance and underdosing look identical from the inside, which is why the answer is usually a blood test and not more forums.

Sample size, blinding, and who paid for it. Those three questions kill most of the confidence in most of these threads.

The effect size I actually noticed is roughly a third of what the write-ups imply, and it took six weeks to be sure.

Animal data is much of what exists here and the human stuff is thin and small.

Happy to be corrected on any of the above.