I find that the solid form (but in a plastic sheath, shaped like a ‘normal’ deodorant stick so it’s easy to apply) works better than the roll-on, and it’s easiest to apply right after I shower to damp armpits.

Just my $.02

As to how well the product works, I’ve tried different brands with different results (I wonder if the concentrations differ). I use the roll on form and as long as I give it a good shake each time, it works great for me, even in the heat and humidity of Florida. Does help to keep those pits well shaved. I know a few guys who use it with good results, but I doubt they’d admit it to anyone

Unfortunately, of the two, one I can no longer buy in any local stores, and the other makes me smell like a girl. For a few few days I tried using rubbing alcohol and I had no issues for about 28 hours worth or so. Oddly enough, mint listerine seems to work best, lasting about 30 hours for any sort of B.O. to rear its stinky head. But all of this was including relatively bland foods and no exercise at all.

We’ll see how one of these mineral crystals works, especially alongside foods heavy in garlic, some impressive amounts of booze, and after an hour or two at the gym (not all at the same time, though!)

If that doesn’t work, I’ll just go out of my way to buy a few cases (crates? pallets? shipping containers?) of the only deodorant that doesn’t seem to cause any problems and try to make it through life on that. Either way, I’ll let everyone know how it goes. The way I see it: either you’re dreadfully concerned about modern deodorants, in which case your mind is already made up, you’re happy with what you already have, or you don’t care about everyone else’s knee jerk reactions, have issues, and want to know if it will work for you. I can be one small anecdotal snippet if it’s the latter.