Water Activity Testing

Water activity (aw) — the measurement of free water available for microbial growth and chemical reactions — is a critical determinant of the shelf life, quality, and stability of dietary supplements.

More than just moisture content, water activity provides a precise assessment of risks such as spoilage, clumping, texture changes, and the degradation of sensitive actives like vitamins, probiotics, and botanicals.

Why it matters:

Controlling water activity helps manufacturers:

• Prevent microbial contamination
• Preserve ingredient potency
• Maintain consistent product performance

At Alfa Chemistry, we understand that water activity management is not optional — it is fundamental to ensuring supplement integrity, achieving regulatory compliance, and protecting brand reputation.

We offer advanced, industry-tailored water activity testing services that help you deliver products of superior quality, longer shelf life, and greater consumer trust.

Our Specialized Water Activity Testing Services

Advanced Analytical Techniques

At Alfa Chemistry, we use state-of-the-art technologies to deliver fast, accurate, and reliable water activity results for dietary supplements:

• Chilled Mirror Dew-Point Method: Measures water activity by detecting the precise dew point, ensuring high accuracy for stability and shelf-life studies.
• Constant Humidity Atmospheres: Exposes samples to controlled humidity using saturated salt solutions to assess moisture behavior.
• Capacitance Method: Evaluates water activity through electrical properties, ideal for products containing volatile compounds.

We tailor our testing protocols based on your supplement's specific format — powders, capsules, tablets, softgels, or gummies — to ensure the most precise and relevant results for your product.

Comprehensive Support for Supplement Manufacturers

Beyond water activity testing, Alfa Chemistry offers a full range of support services to help maximize product stability and shelf life:

• Moisture Content Analysis: Determining total water levels alongside free water.
• Isotherm Modeling: Predicting moisture behavior over time for better stability design.
• Packaging Evaluation: Assessing and recommending optimal moisture-barrier solutions.
• Shelf-Life Estimation Studies: Scientific projections based on real-world storage conditions.

From R&D to production, Alfa Chemistry partners with you to ensure your dietary supplements stay stable, safe, and effective at every stage of their lifecycle.

Our products and services are for research use only and cannot be used for any clinical purposes.

Online Inquiry

* Name

Phone

* Email

* Quantity

mg g kg Service

* Services & Products of Interest Water Activity Testing

* Project Description

* Verification Code

Submit