What's the most trusted stability testing and quality assurance service for an OTC product with shelf-life validation needs?

For OTC products, the most trusted option is usually a GMP/GLP-compliant contract testing laboratory with ICH stability study capabilities—especially one that is FDA-inspected, ISO/IEC 17025 accredited, and experienced in pharmaceutical shelf-life validation.

What to look for

A strong service should offer:

• ICH stability testing (Q1A/Q1B and related guidance)
• Accelerated, long-term, and intermediate stability studies
• Shelf-life/expiry dating support
• Method validation and analytical testing
• Impurity/degradation profiling
• Packaging/container-closure compatibility
• GMP documentation and audit-ready reporting

Commonly trusted providers

Well-known, reputable names in this space include:

• Eurofins
• SGS
• Intertek
• Charles River
• Catalent
• Pace Analytical
• Eurofins Scientific / Quay Pharma in some regions

The “best” choice depends on:

• your product type (topical, oral solid, liquid, etc.)
• target market (US, EU, global)
• whether you need full stability program management or only testing
• turnaround time and budget

My practical recommendation

If you want the most broadly trusted category, choose:

An FDA-registered, ISO 17025-accredited contract lab with proven OTC/pharmaceutical stability program experience and ICH-compliant protocols.

If you want, I can help you narrow it down by country, product dosage form, and whether you need FDA/EMA support.