Microbial Limits and Safety in Cosmetics

Hello, thank you for your additional questions.

Regarding your questions about the acceptable limits for microorganisms found in cosmetics and whether they are harmful, please see the explanation below:

1. Acceptable Microbial Limits:

• The acceptable amount of microorganisms in cosmetics depends on the standards of each manufacturer and the regulations of the governing bodies in each country (such as the FDA in Thailand or the FDA in the United States).
• Furthermore, the type of microorganism found also influences the determination of acceptable limits. Some types of microorganisms may have stricter limits than others.
• Generally, standards specify the total microbial count (Total Plate Count) and require that certain pathogenic microorganisms must not be detected at all, such as Pseudomonas aeruginosa, Staphylococcus aureus, and Candida albicans, within specified limits.

2. Are Microorganisms Found in Cosmetics Harmful to the Skin, and Should There Be No Microorganisms Present At All?

• Good and safe cosmetics should not contain pathogenic microorganisms in amounts harmful to the user.
• Although topical application is less dangerous than consuming contaminated food, some microorganisms found in cosmetics can cause skin infections, irritation, or other problems, especially in individuals with sensitive skin, wounds, or weakened immune systems.
• Preservatives in cosmetics play a crucial role in controlling the growth of microorganisms to ensure product quality and safety throughout its shelf life. Preservative Efficacy Testing (or Challenge Testing) is performed to ensure that the preservative can kill or inhibit potential microbial contamination according to standards.
• Therefore, the goal is to have a very low level of microorganisms or no detection of pathogenic microorganisms according to the defined safety standards. This does not mean the product must be 100% sterile like medical products that undergo sterilization, but rather controlled to levels safe for use.

I hope this explanation helps you understand better. If you have any further questions, feel free to ask.

Thank you,
Staff - MySkinRecipes