People have started paying attention to what's exactly inside their deodorant, which makes sense, because it's something most of us mindlessly apply to our armpits every day.
For years, rumors have swirled that there's a solid link between certain cancers and the aluminum chloride and parabens found in antiperspirants. Although that may not be proven, what is certain is that many chemical antiperspirants are made with ingredients that aren't entirely in line with the clean, green beauty movement.
Now, if the switch to natural deodorant is appealing to you, bear in mind that you will notice a difference when you make the change, because chemical antiperspirant and natural deodorant work differently. Your sweat glands, which have been clogged by aluminum salts, will have, well, a bit more freedom to perform their proper bodily functions. Though the floodgates won't necessarily open, there may be a transitional stage when you're more aware of your underarm sweating. Eventually, your body will reach its natural equilibrium.