Question 1

What Q10 value should I use for my product?

Accepted Answer

A Q10 of 2-3 is typical for most chemical degradation (hydrolysis, oxidation). Biological products (enzymes, proteins) often have Q10 of 3-4. Food products typically use Q10 of 2-3. If accelerated stability data at multiple temperatures is available, Q10 can be determined experimentally by comparing degradation rates.

Question 2

How reliable are accelerated shelf-life predictions?

Accepted Answer

The Q10 model provides a reasonable estimate within ±20% for temperature differences of 10-20°C, assuming the degradation mechanism remains the same. Predictions over larger temperature spans (>30°C) are less reliable. Regulatory agencies (ICH, FDA) typically require confirmatory real-time stability data in addition to accelerated predictions.