“Why should I wear deodorant” is a frequently asked question. In this article, we take a look at the functions of perspiration, how to apply deodorant correctly, and how it works.
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Is Deodorant Necessary?
Summary
- Why Do We Sweat?
- What Are the Uses for Deodorant?
- Deodorant vs. Antiperspirant: What’s the Difference?
- How to Apply Deodorant Correctly?
- How to Limit Unpleasant Odors?
Published July 27, 2022,
updated on August 7, 2024,
by
Maylis, Chemical Engineer
—
5 min read
Why Do We Sweat?
Our body's normal internal temperature is 37 °C. Major temperature variations (hypothermia and hyperthermia) can lead to serious complications (convulsions, loss of consciousness…). Maintaining body temperature at 37 °C is therefore essential.
Nevertheless, at times and for a variety of reasons (physical activity, stress, weather conditions), body heat rises. The resulting perspiration has three functions:
Thermoregulation: to maintain body temperature at 37 °C.
Elimination function: toxins and waste products are evacuated through sweat.
Moisturizing function: sweat is one of the components of the hydrolipidic film, whose role is to keep the skin hydrated and protect it from external aggressors.
What Are the Uses for Deodorant?
As we've just explained, perspiration is essential for the body's thermoregulation and the elimination of metabolic waste products.
Sweat is secreted by the sweat glands. However, bacteria on the skin's surface feed on the sweat, releasing chemicals that cause unpleasant odors. The presence of underarm hair can also contribute to unpleasant odors. They retain sweat and provide a breeding ground for bacteria.
Why is deodorant necessary? Deodorants mask or prevent the appearance of unpleasant odors caused by perspiration, by absorbing moisture thanks to the ingredients they contain (talc, kaolin, magnesite, etc.). They also prevent unpleasant odors by destroying bacteria present on the skin's surface.
Deodorant vs. Antiperspirant: What’s the Difference?
The difference between deodorants and antiperspirants lies in their mode of action.
Deodorants combat unpleasant odors by reducing bacteria on the skin's surface. It also masks odors thanks to its fragrance. It can absorb moisture thanks to the presence of porous powders such as diatomaceous earth or white clay.
An antiperspirant combats unpleasant odors by blocking perspiration. It reduces sweat secretion thanks to ingredients such as aluminum salts. These tighten the pores, reducing perspiration. Antiperspirants also destroy bacteria on the skin's surface.
Note: In everyday language, the term “deodorant” is more commonly used than “antiperspirant”. It's sometimes referred to as an aluminum salt deodorant when in fact it's an antiperspirant.
How to Apply Deodorant Correctly?
Applying deodorant correctly ensures its effectiveness and avoids waste. Here are a few tips on how to apply deodorant correctly, whatever its format:
Deodorant spray: start by shaking the container to mix all the ingredients, then position it about 15 cm from your armpits. Spray quickly and thoroughly, then stop.
Roll-on deodorant: turn the bottle upside down, then roll the roll-on onto each armpit two or three times.
Stick deodorant: turn the knob at the base of the stick to reveal the care product, then roll upwards or downwards twice under each armpit.
Cream deodorant: spread a dab of the product in question under each armpit and wait a few seconds for the product to be absorbed by the skin.
To avoid white marks on your clothes, let the deodorant dry completely before putting on your top. Remember, deodorant must be applied to clean skin. Do not use deodorant on damaged skin. For this reason, don't apply deodorant after waxing or shaving; it's advisable to wait at least 24 hours after waxing or shaving.
How to Limit Unpleasant Odors?
In addition to applying a deodorant, there are a few other things you can do to limit the appearance of unpleasant odors:
Avoid synthetic fabrics and prefer natural materials such as cotton, linen, wool, and silk.
Take regular showers, especially after physical exertion.
Learn to manage your emotions, as stress encourages perspiration.
If you're really bothered by odors, underarm hair removal may be a practical option. The presence of hair accentuates unpleasant odors.
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