Inside Cosmetic Microbiology - What Every Brand Needs to Know Before Launch

Before we dive into our upcoming webinar on Cosmetic Microbiology, Stability & Quality Testing, we wanted to give you a behind-the-scenes look at the science that quietly protects every great product. We’re joined by Dr. Marisa Isaacs, Director of Operations at Stratum Analytical, a Canadian laboratory specializing in microbiological, molecular, and chemical testing for the cosmetic industry. With over a decade of experience across microbiology, chemistry, and regulatory strategy, she works closely with beauty brands to ensure product safety, quality, and compliance at every stage of development. 
Let’s be honest—microbiology and stability testing aren’t the most glamorous parts of beauty… but they are absolutely the reason your product works safely, consistently, and over time. From shelf life to preservation, this is where science meets trust. To make things more real (and a lot more interesting), we sat down with Dr. Isaacs to break down what actually happens in the lab, what brands often get wrong, and what really matters before going to market.
1. For brands that are just starting out, microbiology and stability testing can feel overwhelming. What are the absolute must-have tests every product should go through before going to market?

​The key is to focus on tests that ensure safety, shelf life, and regulatory compliance, without overcomplicating things. While requirements vary by region, there is strong global overlap. Below is a practical, region-specific breakdown of “must-have” microbiology and stability testing before going to market.

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