I personally notice a HUGE difference in immune support when training intensely…I used to get sick whenever I would push myself for more than a few days and when I use it, I honestly don't really ever get FULLY sick, still get run down if I push it but I can then rest for a day and be back to good. without it, I would push it and bam, get a cold or flu. Constantly. It's an absolute must for me.
that being said, I have never noticed any remote muscle building affects, simply immune support and recovery.