Ok, thought I'd chime in here for those of you with true hyperhydrosis!
In my "studies" on excessive sweating one thing I have learned is that almost all people with hyperhydrosis (and honestly almost all people in general), have a severe magnesium defiency.
When you have a mag deficit, you will sweat more, when you sweat more, you lose more mag...see the circle?
To help counteract this, I put magnesium in my product, BUT those with true hyperhydrosis must go further.
The first line of defense I always tell my super sweaters is you NEED to do magnesium soaks.
Magnesium as a supplement does not absorb well. We just can't get as much as we need internally *There is a new mag I'll talk about below, but haven't tested it on sweaters*
They estimate we only absorb about 4% of what we take internally, whether supplement or in food.
Now, if you up your mag intake with a supplement, get ready for very loose bowels. So obviously, taking too much mag isn't necessarily the best answer.
What to do.
Well, just so happens we absorb mag very well through our skin!
First, take a warm not hot, epsom salt bath EVERY NIGHT for 2 weeks. With 3 cups of epsoms (magnesium sulfate) in the bath. Soak for 20 minutes every single night for two weeks. You have to get your mag levels up in your blood/muscles.
After that, do nightly hand (or feet if that's where you sweat most) soaks, about a 1/2 cup-1 cup epsom in bowl of warm water for 10-20 minutes. Until you start getting symptom relief, then you can go down to a couple of times a week to keep your mag levels up in your tissues.
What this does is gets the magnesium into your system, but it also calms the overactive sweat glands.
Now, with that in mined, if you are sensitive to sulfas (like sulfa antibiotics, or sulfa in foods) like I am, then you do not want magnesium sulfate (epsom) what you want is magnesium CHLORIDE. They are also called magnesium flakes. More expensive, but if you have a sensitivity or allergy, then you need to go this route. Some people have better luck with the mag flakes.
Also, you can make lotion with epsom or mag flakes. I personally just boil some water, put in the magnesium to dissolve and mix with a moisturizing cream of my choice. Sometimes it's a store bought cream, sometimes it's coconut oil, sometimes I just mix it with my lotion and have a runnier lotion. That way, when I lotion up my body, I get that magnesium into my skin.
Now, back the * from above about magnesium supplements. There has been a recent development at MIT with a new type of mag, called magnesium l-threonate. aka Magtein.
It's is the most absorb-able form of mag you can get, upwards of the 70-80%! I don't sweat too bad, so it's hard to say if this one affects sweat, but it is the only one to cross the blood brain barrier. My ADHD symptoms and fogginess have gone WAY down since starting. As has my hand puffiness in the morning and fibromyalgia pain. I personally get the Lifesource magtein cause it is the cheapest and has less fillers and other stuff, also has a good therapeutic dose. The main ingredient all comes from one manufacturer, so go for the cheapest. BUT, again, I have not tested this on sweaters so I don't know how it will affect that, it would be great if someone tried it though!
Sorry this was so long, just wanted to make sure you got the info!