Any Tips for Reducing Perspiration?

Hello Ladies! Who's getting ready for spring? I know I am, but once again I am faced with a problem. I SWEAT LIKE A PIG. No matter what I do I can't even make it a whole hour without seeing sweat stains on my armpits. I've tried a lot of different deodorants over the years, from gels to clinical strength, but nothing seems to work. I hardly wear tight fitting clothing, and my wardrobe is limited to sleeveless/tanks or dark t-shirts (I can't even wear light colored t-shirts without seeing sweat). I'm pretty active, so it's not like I'm getting winded because I can't walk up steps. I'm also nowhere near menopause, more like freshman in college. All it really takes is keeping my arms down for too long. So I'm asking you gals for any tips and advice you can offer. I'm game for trying pretty much anything from natural solutions to seeing a doctor, I just need to be pointed in a direction. Please help <3