Why is shelf-life testing important?
Stability Testing Designed for Real-World Supplement Products
We’ve performed shelf-life studies for a wide range of product types, including:
- Dietary supplement capsules & tablets
- Gummies
- Beverages and liquid supplements
- Protein drinks & functional beverages
- Candy and confectionery formats
- Packaged foods (select applications)
- Dietary supplement raw materials
From finished products to ingredients, we tailor each stability study to the specific formulation, dosage form, and risk profile of your product.
We’ve also conducted stability testing programs for some of the largest supplement brands in the industry, giving our clients confidence that their data will stand up to scrutiny.
Accelerated & Real-Time Stability Testing Options
We offer multiple stability testing conditions to match your timeline, regulatory needs, and market goals:
Accelerated Stability Testing – 40 °C / 75% RH
Accelerated stability studies provide faster data by stressing products at elevated temperature. Testing at 40 °C is commonly used to estimate long-term shelf life and is approximately 4× faster than real-time room-temperature studies.
This option is ideal when:
- You need data quickly for a product launch
- Retailers require preliminary shelf-life support
- You want early insight into degradation risks
Real-Time Stability Testing – 25 °C / 60 % RH
Real-time testing at 25 °C / 60 % relative humidity represents standard room-temperature conditions and is considered the definitive shelf-life data for most dietary supplements.
We often recommend running real-time and accelerated studies in parallel—giving you both fast insights and long-term confirmation.
Zone 4b / Tropical Stability Testing – 30 °C / 75% RH
For products intended for warmer climates such as Southeast Asia and South America, we also offer 30 °C stability conditions, commonly used to represent tropical or high-heat regions.
Stability Study Lengths Aligned to Your Expiration Date
Every stability study is customized based on your target expiration date and risk tolerance. Common study designs include:
- Short-term accelerated programs
- 6-, 12-, 18-, and 24-month real-time studies
- Custom timelines to support specific retailer or internal requirements
We’ll help you choose the most efficient design to support your labeling and business goals.
Flexible Stability Testing Packages
Different brands need different levels of data. We offer flexible stability testing packages that range from cost-conscious to extremely comprehensive:
Essential Stability Package
Designed for brands that want to minimize cost while meeting basic requirements.
- As few as 2 time points (baseline + endpoint)
- Targeted testing only
- Ideal for low-risk formulations or early-stage products
Balanced Stability Package
A practical balance of budget and robustness.
- Multiple time points
- Combination of accelerated and real-time testing
- Focus on key quality attributes
Comprehensive Stability Package
For brands that want maximum confidence and documentation.
- 6 or more time points
- Accelerated + real-time conditions
- Full analytical coverage across all relevant parameters
Every package is fully customizable, and anything in between is always an option.
Broad Analytical Coverage for Stability Studies
Our stability studies can include thousands of possible tests and ingredients, depending on your product and goals.
Common Stability Testing Categories Include:
- Active ingredient potency (hundreds of vitamins, amino acids, botanicals, and other supplement actives)
- Contaminants (heavy metals, residual solvents, pesticides, as applicable)
- Microbiological testing
- Oxidation, moisture, and water activity (where relevant)
Built for Supplements. Designed for Scrutiny.
We understand the realities of the dietary supplement industry: tight timelines, retailer expectations, and complex formulations. Our dietary supplement shelf-life testing programs are designed to produce data you can confidently stand behind.
Whether you’re launching a new product, extending an expiration date, or preparing for retailer review, we’ll help you design a stability testing program that fits your product, your budget, and your timeline.
Ready to Plan Your Stability Study?
Contact us to discuss your product and build a custom supplement stability testing program tailored to your needs.

Dietary supplements

Cosmetics

Beverages
The Harken Difference
We don’t just provide valuable data you need to know about your product stability but also offer solutions on how to resolve them. We will be your partner through every step of your manufacturing process to help you achieve the best product possible.
Consulting
Contact us with any scientific or manufacturing challenges.
We can help troubleshoot issues related to production, formulation, and product stability.

Excellent team of scientists
We get invested in your projects and want to see you succeed, so we put in the extra effort to help you solve problems.

