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Rumors: Advise female friends, don't use hygienic products such as cleansing sanitary napkins, such as preparations, herbs, fragrances, etc.! The cool sanitary napkin is cool to use because the sanitary napkin adds a mint to the surface material. The mint can be slowly released during use, thereby destroying the weak acid environment of the genitals. The damage of the weak acid environment will make the genitals Your own resistance is reduced! It will make the amount of menstruation less and less.
Since the packaging of the cool sanitary napkins on the market is not marked with the added ingredients and added amount, we cannot determine whether it will have a beneficial or harmful effect on the human body. This article only briefly analyzes whether the cooling sanitary napkins with the addition of mints are harmful to women's health.
Truth: Using a cool sanitary napkin will not damage the weak acid environment in the vagina, nor will it cause less menstrual flow. As long as it is a hygienic sanitary napkin, the type of use is only a personal habit. However, it should be noted that women with sensitive skin and allergies should use sanitary napkins with spices and pharmaceutical ingredients to avoid skin irritation and allergic reactions.
How does the refreshing feeling of sanitary napkins come from?
"Cool" is usually the feeling of temperature on the skin or mucous membranes. However, not all "cool" feelings are due to changes in temperature. Mint contains a substance called menthol. This substance and some of its derivatives can stimulate the cold receptor TRPM8 receptor (a special protein) in the skin and mouth, making the body "cold". Feeling, but the temperature has not changed.
The TRPM8 receptor is found in sensory neurons and was once called "cold and menthol receptor 1" (CMR1). As the name suggests, chemicals such as menthol activate the receptor like the cold itself, creating a "cold" feel. In addition to menthol, the agonist of the TRPM8 receptor also has a synthetic compound "Icilin" which produces a 200-fold greater cold sensation than menthol. In addition, linalool, citronellol, hydroxycitronellal, menthamide (WS-3, WS-23), menthol ketal, menthyl lactate and other substances are also agonists of the TRPM8 receptor, which can make it cold. sense.
Does the mint remove the weak acidic environment of the vagina?
We know that the vagina is not a sterile environment, but the balance of its micro-ecological environment has a certain defense function against the invasion of external microorganisms, which is called the self-purification of the vagina. The weak acidic environment of estrogen, Lactobacillus vaginalis and vagina is the three important links that constitute the self-purification ability of the vagina. One or more of these three links are broken, the vaginal defense ability will be reduced, and it is vulnerable to invasion by foreign pathogens, leading to vaginitis.
Studies on menthol have shown that menthol itself has a certain antibacterial ability, which is probably the source of the rumored "weak acid environment that destroys the genitals." If menthol inhibits the reproduction of Lactobacillus in the vagina, it is theoretically possible to cause damage to the weakly acidic environment of the vagina, making the user susceptible to vaginitis.
However, in actual situations, we should note that the minimum inhibitory concentration (MIC) of menthol for most bacteria is about 0.04-0.2 mg/ml, which is about 40-200 ppm (1 ppm is one millionth). ). The cooling threshold of menthol is about 0.8-3ppm, and the concentration required to produce a cool feeling is much lower than the minimum inhibitory concentration of menthol. The topical menthol concentration may not reach the minimum inhibitory concentration for the sole purpose of cooling the skin or mucous membranes. At the same time, if you use a sanitary napkin with menthol added, it is only placed near the vaginal opening. It is not a built-in tampon. The amount of menthol that actually enters the vagina is very small, far less than it. Minimum inhibitory concentration. Therefore, it is probably not necessary to worry that the amount of menthol added to the sanitary napkin will affect the normal flora in the vagina.
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