Aerobic Mesophilic Bacteria in Cosmetics | Accredited Test

What is Aerobic Mesophilic Bacteria?

What are Aerobic Mesophilic Bacteria?

Aerobic mesophilic bacteria are microorganisms that can multiply between 20-45°C and live in an oxygenated environment. These bacteria are commonly found in soil, air, water and living organisms. Cosmetic products can be contaminated with such bacteria during the manufacturing process or during use. This can both reduce product quality and threaten user health.

Why Cosmetic Products Are Tested

Cosmetic products come into direct contact with sensitive areas such as the skin, hair, mouth and eye area. It is therefore of great importance that they are microbiologically safe. Aerobic mesophilic bacteria counts are an essential test to determine whether products are produced under hygienic conditions.

The main objectives of the test are:

• Early detection of pathological bacterial contamination
• Assessing microbial stability during product shelf life
• Monitor the hygiene level in the production environment
• To ensure consumer safety and comply with legislation

What is the Scope of the ISO 21149 Standard?

ISO 21149 is an internationally recognized test method for determining the number of aerobic mesophilic microorganisms in cosmetic products. This standard includes laboratory sampling of the product, incubation in appropriate culture media and microscopic evaluation of the results.

Analyzes with ISO 21149:

• Products are tested directly
• Possible contamination levels expressed numerically (CFU/g)
• Evaluation based on critical thresholds
• Additional tests (e.g. Pseudomonas, Staphylococcus) recommended if necessary

Cosmetic Safety at Your Side with Nanolab

Nanolab offers comprehensive microbiological analysis services for the cosmetics industry. It applies all cosmetic test procedures including ISO 21149, especially aerobic mesophilic bacteria tests, with high precision. It provides reliable results with its GMP and ISO 17025 accredited laboratory infrastructure.

Nanolab's main cosmetic testing services:

• Aerobic mesophilic bacteria count
• Tests for pathogenic bacteria (E. coli, Staphylococcus aureus, etc.)
• Fungal and yeast counting
• Protective effectiveness tests (Challenge Test)
• Stability and shelf life analysis