Anresco Laboratories

Anresco Laboratories is an ISO 17025-accredited analytical testing lab offering food safety, cannabis/hemp compliance and R&D, kratom, dietary supplement, FDA import-detention and medical device testing. It holds memberships in ACIL, AHPA, NCIA and others, is FDA-recognized, and runs specialized hemp testing programs for California, Colorado, Florida, Georgia, Kentucky, Louisiana, Tennessee and Texas plus a Tokyo office for Japan (MHLW) testing.

Founded in 1943 by Dr. Sylvan Eisenberg and now led by his son David Eisenberg, Anresco is headquartered in San Francisco's Bayview district in a 13,500 sq ft facility. In October 2025 it partnered with NJ Labs (est. 1936) to form the 'Anresco NJ Labs' network, adding locations in Los Angeles, New York and Fort Lauderdale while each entity retains independent operations.