Why Dissolution Testing Matters for Supplement Brands
At SREKE, we see firsthand how dissolution testing separates premium supplements from commodity products. Dissolution testing measures the rate and extent to which an active ingredient is released from a tablet or capsule into a solution — a critical indicator of bioavailability and product performance.
While the FDA does not mandate dissolution testing for dietary supplements under current Good Manufacturing Practices (cGMPs) in the same way it does for drugs, USP general chapter <711> Dissolution provides the recognized standard. EFSA also evaluates bioavailability data when assessing health claim substantiation for food and supplement ingredients.
For supplement brand owners, dissolution testing serves three essential purposes:
- Quality assurance: Verifies that each batch releases active ingredients consistently, batch after batch.
- Bioavailability confidence: Ensures the product delivers the promised nutrients, not just what's listed on the label.
- Regulatory readiness: Builds a defensible quality file that supports FDA 483 responses, EFSA evaluations, and retailer audits.
We recommend that every tablet and capsule product manufactured at SREKE undergoes dissolution profiling as part of our standard quality control protocol — even when not strictly required by regulation.
Key Manufacturing Considerations at SREKE
Our GMP-certified facility in Guangzhou integrates dissolution testing into every stage of tablet and capsule production. Here is what our team evaluates for every formulation:
USP Apparatus Selection
Dissolution testing follows USP standards using one of four primary apparatus types:
- Apparatus 1 (Basket): Used for tablets and capsules that tend to float or require gentle agitation.
- Apparatus 2 (Paddle): The most common method for standard tablets and hard gelatin capsules.
- Apparatus 3 (Reciprocating Cell): Ideal for products that swell, expand, or are prone to floating.
- Apparatus 4 (Flow-Through Cell): Used for coated tablets, patches, and poorly soluble ingredients.
At SREKE, we select the appropriate apparatus based on the dosage form, coating type, and solubility profile of your formulation.
Dissolution Media and Conditions
The choice of dissolution medium directly impacts test results. Common media include:
- 0.1N hydrochloric acid (pH 1.2) — simulates gastric conditions
- Phosphate buffer (pH 6.8) — simulates intestinal conditions
- Purified water or buffer solutions — for water-soluble formulations
Temperature is maintained at 37 ± 0.5°C to mimic body temperature, and agitation speed is typically set between 50 and 100 rpm depending on the apparatus and product type.
Excipient and Formulation Impact
Disintegrants (e.g., croscarmellose sodium, sodium starch glycolate), binders (e.g., povidone, HPMC), and lubricants (e.g., magnesium stearate) all influence dissolution profiles. Over-lubrication, for example, can create a hydrophobic barrier that delays release. At SREKE, our formulation scientists optimize excipient levels to achieve target dissolution within 30 minutes for immediate-release products.
Coating and Enteric Considerations
For enteric-coated or sustained-release products, dissolution testing validates that the coating remains intact in acidic media and releases the active ingredient at the intended intestinal pH. SREKE uses film-coating and enteric-coating lines capable of achieving precise release profiles compliant with USP <711> criteria.
Quality Control Standards at SREKE
Our testing protocols align with:
- USP <711> Dissolution
- USP <1090> Pharmaceutical Dosage Forms
- ISO 22000 food safety management standards
- HACCP principles applied to supplement manufacturing
- FDA 21 CFR Part 111 (cGMPs for dietary supplements)
Every production batch is tested for dissolution consistency, and we provide full test reports to our brand partners as part of our standard documentation package.
How SREKE Helps You Get to Market Faster
At SREKE, we understand that time-to-market is a competitive advantage. Our streamlined OEM and ODM process is designed to move your product from concept to shelf efficiently.
Formulation Development
Our in-house R&D team develops and optimizes formulations tailored to your target dissolution profile. We offer both off-the-shelf formulas and fully custom development, with typical formulation timelines ranging from 2 to 6 weeks depending on complexity.
MOQ and Production Flexibility
We accommodate a wide range of order quantities. Our MOQ for tablets and capsules is competitive and scalable, allowing both emerging brands and established companies to access premium manufacturing without excessive minimum commitments. Contact our team for specific MOQ details based on your product type.
Lead Time
Standard production lead times at SREKE range from 4 to 8 weeks from formula approval to finished goods, depending on dosage form, packaging complexity, and order volume. Expedited timelines are available for urgent launches.
Compliance and Documentation
We provide complete documentation including:
- Dissolution test reports per batch
- COA (Certificate of Analysis)
- GMP compliance certificates
- Ingredient sourcing documentation
- Stability testing data (available upon request)
This documentation supports your FDA registration, retailer compliance reviews, and international market entry.
Packaging Options
SREKE offers a full range of packaging solutions including blister packs, HDPE bottles, amber glass, and child-resistant closures. We also support private-label packaging design and print coordination.
Industry Trends and Market Opportunities
The global dietary supplement market continues to grow, and dissolution performance is becoming a key differentiator. Here are trends shaping the industry:
- Bioavailability-focused formulations: Consumers and brands increasingly demand proof that supplements are absorbed effectively. Dissolution data provides that evidence.
- Personalized nutrition: Custom-dosed tablets and capsules require precise dissolution control to ensure consistent delivery across varying strengths.
- Clean-label demand: Brand owners are requesting simpler excipient lists without compromising dissolution performance — a challenge our formulation team addresses regularly.
- Regulatory scrutiny: FDA has intensified cGMP enforcement in the supplement sector. Brands with robust dissolution testing and documentation are better positioned for compliance.
- Plant-based and vegan capsules: HPMC-based vegan capsules are gaining market share, and their dissolution profiles differ from traditional gelatin capsules — requiring adjusted testing protocols.
At SREKE, we stay ahead of these trends by investing in advanced dissolution equipment and continuous staff training, ensuring your product meets both current and emerging market expectations.
Frequently Asked Questions
What is dissolution testing, and why does it matter for supplements?
Dissolution testing measures how quickly and completely an active ingredient is released from a tablet or capsule into a simulated bodily fluid. It matters because it directly correlates with bioavailability — if the ingredient does not dissolve properly, the body cannot absorb it, and the product underperforms regardless of what the label claims.
Is dissolution testing required by the FDA for dietary supplements?
The FDA does not explicitly require dissolution testing for dietary supplements under 21 CFR Part 111. However, cGMPs require that manufacturers verify the identity, strength, composition, and quality of their products. Dissolution testing is widely regarded as best practice and is often expected by retailers, auditors, and international regulators. At SREKE, we perform dissolution testing on all tablet and capsule products as part of our quality commitment.
What is the difference between disintegration and dissolution testing?
Disintegration testing measures how quickly a tablet or capsule breaks apart into smaller particles. Dissolution testing goes a step further by measuring how quickly the active ingredient dissolves into solution. A product can disintegrate rapidly but still exhibit poor dissolution if the active ingredient has low solubility. Both tests are important, but dissolution is the more comprehensive indicator of performance.
How long does dissolution testing take?
A standard dissolution test typically runs for 30 to 60 minutes per batch, though some formulations may require longer time points. The full process — including sample preparation, analysis, and reporting — is usually completed within 24 to 48 hours at SREKE's quality control laboratory.
Can SREKE help with custom dissolution targets for my formulation?
Yes. Our R&D team works with you to define target dissolution profiles based on your ingredient(s), intended release type (immediate, delayed, or sustained), and market requirements. We optimize excipients, compression parameters, and coating systems to meet those targets consistently at scale.
What MOQ do you require for tablet and capsule OEM orders?
Our MOQ varies by dosage form and packaging configuration. We work with brands of all sizes, from startups to established companies. Contact our team for current MOQ details and we will provide a tailored recommendation based on your product specifications.
Do you provide dissolution test reports for each batch?
Absolutely. Every production batch manufactured at SREKE is accompanied by a Certificate of Analysis that includes dissolution test results when applicable. These documents are provided digitally and are ready for your records, retailer submissions, or regulatory filings.
Can you manufacture enteric-coated or sustained-release supplements?
Yes. SREKE has dedicated coating lines and formulation expertise for enteric-coated and sustained-release tablet and capsule products. We validate release profiles through rigorous dissolution testing to ensure they meet your specified criteria.
Ready to launch your supplement brand? SREKE provides GMP-certified OEM/ODM manufacturing for softgels, capsules, tablets, powders, gummies, and liquids. Contact us for a free quote or email [email protected] — we respond within 24 hours.