Microbial Testing of Cosmetic Products: Ensuring Safety and Compliance
Microbial contamination in cosmetic products poses significant health risks to consumers, including skin irritation, infections, and more severe complications in immunocompromised individuals. To ensure safety and regulatory compliance, microbial testing has become a critical quality control step in the cosmetic manufacturing process.
At ME-COS LAB, we specialize in microbiological testing of cosmetic and personal care products in accordance with TAF-accredited standards. Our testing services help manufacturers and brands meet both local and international safety regulations, providing peace of mind and product integrity from production to shelf.
Total Viable Count (TVC)
One of the key tests in microbial analysis is the Total Viable Count (TVC), also known as the total aerobic microbial count (TAMC) and total yeast and mold count (TYMC). This test measures the total number of colony-forming units (CFUs) of bacteria, yeast, and mold in a product.
The limits of TVC vary depending on the type of cosmetic product:
Products for children under 3 years old, around eyes, or on mucous membranes:
TAMC: ≤ 100 CFU/g or mL
TYMC: ≤ 10 CFU/g or mL
Other cosmetic products:
TAMC: ≤ 1000 CFU/g or mL
TYMC: ≤ 100 CFU/g or mL
Exceeding these limits may indicate poor manufacturing hygiene or unsuitable preservation systems.
Specified Microorganisms to Avoid
Apart from total counts, specific harmful microorganisms are strictly prohibited in cosmetic products. According to international guidelines (such as ISO 17516), the following four pathogens must not be detectable in a 1g or 1mL sample:
Staphylococcus aureus – Can cause skin infections and is especially dangerous if applied on damaged skin.
Pseudomonas aeruginosa – Common in water-based products and can lead to severe infections.
Escherichia coli (E. coli) – Indicates fecal contamination and can cause gastrointestinal and skin issues.
Candida albicans – A type of yeast that may cause irritation or infections in sensitive skin or mucosal areas.
These pathogens must be absent in the finished product to be considered microbiologically safe.
Yeast and Mold
Cosmetic products, especially those with natural or water-based ingredients, are susceptible to contamination by yeasts and molds. These microorganisms can degrade product quality, cause discoloration, odor, or spoilage, and in some cases, provoke allergic reactions.
At ME-COS LAB, we perform precise testing for yeast and mold, helping identify and prevent spoilage issues during product development, stability testing, and batch release.
Why Choose ME-COS LAB?
ME-COS LAB provides comprehensive microbiological testing services for cosmetic products, including:
Total Viable Count (TAMC & TYMC)
Detection of specified pathogens (S. aureus, P. aeruginosa, E. coli, C. albicans)
Mold and yeast analysis
Testing in compliance with TAF-accredited protocols and ISO standards
With our rigorous procedures, modern lab facilities, and expert technicians, we support cosmetic manufacturers in ensuring their products are safe, stable, and compliant with regulatory requirements.