Benzoic acid is a white crystalline solid that has a long history of use in medicine, as well as in food preservation, perfumes, and dyes.
In medicine, benzoic acid has been used as an antifungal agent, particularly in the treatment of skin infections caused by yeasts and other fungi. It is also used as an ingredient in some topical creams and ointments for skin conditions, such as psoriasis and eczema.
Benzoic acid can also be used as a food preservative, as it has antimicrobial properties and helps to prevent the growth of bacteria and fungi in food. It is commonly used in the preservation of acidic foods, such as fruit juices, pickles, and condiments.
However, it's important to note that benzoic acid can cause side effects in some people, particularly if it is used in high doses or if it is ingested in large amounts. It's always recommended to consult with a healthcare professional before using benzoic acid or any other new remedies or treatments.