"Perspiration levels are not as high compared to daytime and usually the 'deodorizing' is most important during the daytime. While using it occasionally at bedtime is not harmful, use of deodorants around the clock may be an additional source of unnecessary irritation to the skin."
At night, your body temperature drops and you tend to sweat less. Applying antiperspirant at night when your sweat glands are less active means it is easier for it to absorb into the skin than it is in the morning.
The benefits of wearing deodorant to bed
It gives the product more time to sink into your skin. Sweat glands are less active at night, so the product absorbs faster. Deodorant works better on dry skin (as opposed to damp skin after a shower in the morning).
The most effective time of day to apply deodorant is at night before going to bed, and it is especially important to apply your antiperspirant at night. Your body temperature is lower and your underarms dryer at this time, so the deodorant will have a better chance to work on your skin.
You will end up with bad body odors.
So if you're leaving without putting on deodorant, you're leaving yourself "vulnerable to body odor." And for more things that may be causing odors, make sure you're washing The Body Part Most People Forget About Every Time They Shower.
With a little patience, I discovered it is possible to wean your body off of the chemical antiperspirants. I rarely notice issues with excess perspiration or stinky pits, even after my heavy workouts. It's time we really take notice of what we're putting on our bodies just as much as we care about what we put in them.
The best way to prevent smelly armpits is to wash daily and after sweating. Using antiperspirant or deodorant and shaving the armpits can also help. Avoiding alcohol and certain foods, such as onions and garlic, will also help prevent smelly armpits in some cases.
Expect to Detox
If you've been using conventional deodorant or antiperspirant for years, it can take 2-4 weeks to detox and release all of the aluminum in your pits that's been preventing you from sweating. During this time, you might notice that you're a little more stinky than usual.
You'd smell
Unsurprisingly, a person would develop quite a funk after 365 showerless days. Rokhsar said your stench likely would come as a result of the bacteria and dead skin accumulating on you. After a year, he said, you'd have a build-up of skin stratum corneum, or dead skin on top of your skin.
Giuseppe. "When switching from an antiperspirant to a deodorant, you are removing the aluminum and releasing waste which has been blocked. This is a natural process as part of our body's built-in mechanisms, but it may contribute to releasing some slightly unusual body odor in comparison to what you are used to.
This will vary from person to person, but generally we say about 3 months. Given that we don't use filler ingredients, and you only need 1 – 2 swipes per application, you may find it lasts you even longer.