We lawyers would object to the statement as "overbroad." Clearly some supplements are garbage, others clearly not. I tried Noexplode years ago, it was not a positive experience.
I tried N.O.-Xplode when it first came out and was all the rage.
It honestly gave me nothing more than a caffeine bump with significant gastric disturbance.
I gave it a fair chance by finishing the container, but I wasn’t impressed at all and I never bought it again.
However, lots of people raved about it - including trainers I personally know.
As for Jack3d, I’ve never used it per se, but I
have used a concentrated form of one of its prime ingredients, DMMA.
Benchmaster turned me onto the stuff, and it definitely helps enhance focus and concentration.
The synergistic effect with caffeine was remarkable. The DMMA even seemed to soften the “crash” that often accompanies consumption of larger quantities of caffeine over a brief period.
The only downside for me was that the strength of the effects were inconsistent.
Water also seems to weaken its potency, which rules it out as a pre-w.o. supplement for me because I drink a ton - particularly around my workouts.
There are probably other variables, as well.
Many people also can, and do, develop a tolerance to DMMA.