Dietary supplement & natural products testing

Whether you work with vitamins and minerals, nutraceuticals, CBD or natural ingredients, our complete testing service delivers reliable and efficient results. 


Verifying the presence of nutritional and functional ingredients in your product requires a robust analytical approach. You need to be confident that labels are correct and claims are fully substantiated. But you also need this complex analysis to be carried out quickly and efficiently by experts. That’s why we offer a full service with the knowledge, logistics and problem-solving capabilities to ensure a reliable turnaround. 


In our ISO accredited labs, we can detect, quantify and evaluate a wide range of ingredients throughout your product’s life cycle. What’s more, we continually update our analytical methods to align with new formulations, formats and regulations, as well as the latest health and wellness trends.


RSSL your trusted partner


At RSSL, we are dedicated to delivering a smooth and seamless customer experience, ensuring your analytical testing is both efficient and stress-free.  With a dedicated account manager for each client, we offer a personalised approach to meet all your supplement and natural product testing needs.  Our commitment to exceptional customer service is demonstrated in our Net Promoter Score of +67, reflecting our commitment to customer satisfaction.


We provide quick sample shipping with overnight logistics, competitive pricing and guaranteed turnaround times including priority testing when needed. As the supplement industry's go to laboratory, RSSL is your trusted partner for comprehensive, accurate and reliable supplement testing services.




Comprehensive supplement analysis and testing


Tailored to support your product development strategies, our comprehensive service gives you the data you need to satisfy essential requirements in terms of quality, safety and compliance. As your experienced testing partner, we provide: 

  • Batch release testing
  • Nutrition and supplement fact testing
  • Ingredient and Quality Control (QC) testing
  • Quality, potency and purity testing
  • Stability and shelf-life studies to substantiate health and nutritional labelling claims
  • Novel ingredients evaluation, characterisation, application and regulatory support
  • Physical and chemical contaminant screening for a wide range of substances including heavy metals, allergens, pesticides and solvent residues


  • Microbiological testing to ensure products are free from harmful pathogens
  • Packaging safety, chemical testing, integrity and functionality testing
  • Method development and validation
  • Product development and reformulation
  • Manufacturing troubleshooting (eg powder flow)
  • Quantification of fat-soluble and water-soluble vitamins
  • Quantification of a wide range of minerals including Calcium, Magnesium, Potassium, Sodium, Iron, Copper, Manganese, Zinc, Selenium, Phosphorus, Sulphur and Iodine





Get in touch


Are you looking for a dietary supplement testing service you can trust? With our dedicated, customer focused team you can have confidence that your testing will be done accurately and with your needs in mind. Contact us here