Top 13 Assessed Supplement Testing Labs (2026)

Alkemist Labs is an independent botanical and mushroom testing laboratory in Garden Grove, California. Founded by Elan Sudberg, the company specializes in identity and potency testing for natural products using HPTLC (High Performance Thin-Layer Chromatography), microscopy, and HPLC methods. Their ISO/IEC 17025 accreditation through A2LA specifically covers dietary supplement and botanical identification; a focused scope that reflects their deep specialization. Alkemist Labs maintains one of the largest collections of analyzed and verified botanical reference materials in the industry, containing over 15,000 specimens spanning 20 years. This collection is critical for identity testing accuracy. AG1 (Athletic Greens) is a notable client. Alkemist publishes a biannual report on the top botanicals and fungi that commonly fail identity testing, providing transparency that is rare in the testing industry. They are a smaller, specialized lab compared to Eurofins or SGS, which means more personalized service but potentially longer wait times during peak demand.

Labstat International operates ISO/IEC 17025 accredited laboratories in Kitchener, Ontario (Canada) and Greensboro, North Carolina. While best known as the world's largest independent nicotine testing laboratory, Labstat has expanded into dietary supplement and natural health product testing. Their supplement testing services include identity testing, potency analysis, heavy metals, microbial testing, and stability studies. Labstat's accreditation through the Standards Council of Canada covers one of the most comprehensive lists of accredited methods among independent labs. They follow GLP principles (21 CFR Part 58) and comply with 21 CFR Part 11 for electronic records. The Greensboro, NC facility provides US-based testing with the same accredited methods. Labstat is particularly relevant for brands selling in both the US and Canadian markets, as they test for compliance with both FDA regulations and Health Canada Natural Health Product requirements.

Anresco Laboratories is a family-owned analytical testing company founded in 1943 in San Francisco, California, with over 82 years of experience. The company is ISO/IEC 17025:2017 accredited and recognized by the FDA. Anresco operates its headquarters and primary laboratory in San Francisco with branch offices in Los Angeles, New York, and Fort Lauderdale. In a recent strategic move, Anresco united with NJ Labs to form a nationwide testing network, expanding their geographic coverage. Their testing capabilities span food safety, cannabis compliance, and dietary supplement validation, including identity, potency, contaminant, and microbiological testing. Anresco was also an exhibitor at SupplySide Global 2025.

Certified Laboratories provides ISO 17025-accredited and cGMP/GLP-compliant testing services for dietary supplements, botanicals, cosmetics, and OTC drugs. They offer identity, purity, strength, and composition analysis along with regulatory consulting services. Certified Laboratories was approved as an Amazon TIC (Testing, Inspection, and Certification) provider for dietary supplements in January 2026, joining the 7 labs authorized to verify cGMP compliance for Amazon sellers. Their services span microbiology, analytical chemistry, contract research, and certification and audit services.

Contract Testing Laboratories of America (CTLA) is an ISO/IEC 17025:2017 accredited laboratory specializing in dietary supplement, food, and cosmetics testing. CTLA's accreditation is through Perry Johnson Laboratory Accreditation, Inc. (PJLA). The laboratory offers comprehensive testing services including microbiology, identity testing, heavy metals and mineral analysis (ICP), vitamin testing, stability studies, preservation efficacy testing, allergen testing, protein and amino acid analysis, weight variance testing, and surface ATP testing. All testing follows FDA requirements under 21 CFR Part 111 and the Dietary Supplement Health and Education Act (DSHEA). CTLA publishes extensive educational resources on dietary supplement testing requirements, certificates of analysis (COA), and FDA compliance.

Eurofins Scientific operates a global network of over 900 laboratories across 62 countries. Their US supplement testing is anchored by the ISO/IEC 17025 accredited Eurofins Nutrition Analysis Center in Des Moines, Iowa, and the Eurofins Food Chemistry Testing lab (formerly Covance Food Solutions) in Madison, Wisconsin. Eurofins provides identity, potency, purity, stability, and contaminant testing for dietary supplements using HPLC, UPLC, GC, LCMS, and ICP-MS technologies. They test botanicals, vitamins, minerals, sports nutrition products, and pet supplements. Their stability testing services include both accelerated and real-time shelf-life studies. Eurofins is publicly traded (EUFI.PA) and employs over 62,000 people globally, making them one of the largest testing organizations in the world. This scale provides redundancy and capacity but may mean less personalized service for smaller supplement brands.

Intertek's Champaign, Illinois laboratory specializes in analytical testing of nutraceuticals, botanicals, and natural products. With more than 15 years of supplement-specific experience, the lab offers identity, potency, purity, safety, and shelf-life testing. Their capabilities span analytical chemistry, botanical chemistry, analytical biochemistry, and microbiology. Intertek also provides label review and validation services, allergen testing, contaminant and adulterant risk management, and method development. Globally, Intertek Group plc operates more than 1,000 laboratories with over 45,000 employees. The Champaign lab holds ISO/IEC 17025 accreditation and operates under cGMP. Their 2022 launch of an adulteration panel analysis for nutraceutical supplements demonstrates investment in supplement-specific testing innovation. Like Eurofins and SGS, Intertek's size provides capacity and global reach, but the Champaign lab's dedicated supplement focus gives it more specialization than a general-purpose lab.

Mérieux NutriSciences (MXNS) is a global food safety and quality services company and one of seven Amazon-approved TIC (Testing, Inspection, and Certification) providers for dietary supplements as of January 2026. The company operates a network of ISO/IEC 17025:2017 accredited laboratories providing comprehensive testing including full microbiology, chemistry, heavy metals, contaminants, and nutritional analysis for dietary supplements. Mérieux NutriSciences incorporated the former Silliker laboratories into its network, including a $14 million Solution Center in Crete, Illinois with over 200 food professionals. The company also offers sensory and research support, consultancy, auditing and training, and digital quality tools. MXNS provides dedicated customer care and supplement experts for Amazon Compliance Verification.

Microchem Laboratory is an FDA-registered, ISO 17025-accredited testing laboratory with facilities near Austin and Dallas, Texas. Accreditation is through Perry Johnson Laboratory Accreditation, Inc. (PJLA). They are GMP and GLP compliant. Testing services include USP compendial methods, rapid microbial assays, preservative challenge testing, dietary supplement identity and potency testing, and environmental monitoring. They specialize in microbiological testing and contamination consulting, helping manufacturers with out-of-specification events and root cause analysis.

NSF International is an independent, not-for-profit organization founded in 1944 in Ann Arbor, Michigan. Their dietary supplement testing division operates ISO/IEC 17025 accredited laboratories that test products against NSF/ANSI 173, the only American National Standard for dietary supplement ingredients. NSF tests for label accuracy, contaminant screening (heavy metals, pesticides, mycotoxins, microbial), and banned substances through their Certified for Sport program. NSF is widely recognized by retailers and regulators; many major retail chains require NSF GMP certification as a baseline for supplement listing. Their lab network spans North America, Europe, and China, with ingredient testing available through their Shanghai facility for brands sourcing from Asia. NSF also operates the GMP facility certification program that many contract manufacturers pursue.

Qalitex Laboratories reports ISO/IEC 17025 accreditation for its dietary supplement, cosmetic, and consumer goods testing laboratory with facilities in Irvine and San Diego, California. Their A2LA accreditation scope covers identity, potency, heavy metals (ICP-MS), microbiology (USP methods), and pesticide testing for dietary supplements. Qalitex also offers preservative efficacy testing, stability studies under ICH guidelines, and regulatory compliance support. Testing programs are designed to meet 21 CFR Part 111, California Proposition 65, Amazon compliance, and Health Canada NHP Directorate standards. Standard panel turnaround starts at 48 hours. Qalitex publishes educational resources on ISO 17025 accreditation and independent lab testing, including a March 2026 guide for testing labs seeking accreditation.

SGS Nutrasource combines regulatory consulting, clinical trial management, and laboratory testing for the nutraceutical industry. Originally founded as Nutrasource Diagnostics in Guelph, Ontario, the company was acquired by SGS SA in May 2023, giving it access to SGS's global network of 2,600+ laboratories in 100+ countries. Their Harrisburg, Pennsylvania laboratory is ISO/IEC 17025 accredited and specializes in heavy metals, minerals, and vitamins testing of dietary supplements. SGS Nutrasource has supported over 20,000 product launches and completed more than 1,700 clinical trials for claim substantiation. They operate proprietary certification programs including IFOS (fish oils), IKOS (krill oils), IGEN (non-GMO), and IPRO (probiotics). The company serves 2,000+ clients globally across dietary supplements, pet supplements, pharmaceuticals, cosmetics, and infant nutrition.

UL Solutions (formerly Underwriters Laboratories) is a global safety science company that operates an FDA-registered dietary supplement testing laboratory in Canton, Massachusetts. UL technicians use industry-approved methodologies including DNA testing for botanical identity verification, potency analysis, and contaminant screening for heavy metals, pesticides, and microbial hazards. UL offers a Dietary Supplement Verified Mark program; brands that participate and qualify can display the UL Verified mark on their products, providing third-party verification of quality and label accuracy. NOW Foods is a notable brand that holds UL dietary supplement certification. UL has been in operation since 1894 and employs over 15,000 people worldwide. Their supplement testing division is smaller relative to their electrical safety and consumer product testing businesses, but carries the weight of a globally recognized certification mark.