Quality Control

Testing Methodologies

We utilize a variety of methods to test all raw materials upon receipt making sure that they meet our uncompromising standards. Tests confirm identity and potency and screen for impurities: heavy metals, insecticides and microbes. All raw materials are quarantined until accepted or rejected by the QC department. Finished products undergo final testing before being released for packaging.


Validation and Documentation

Validation helps us to assure that each batch meets predetermined specifications. Inspections are conducted throughout the manufacturing process monitoring weights, hardness, conformation, disintegration and color. Documentation is conducted on all procedures and maintained at Highland Laboratories.


Raw Material Procurement & Analysis

With over 38 years in the industry Highland has developed long term relationships with the best growers and manufacturers. Our vendor evaluation process includes auditing their facilities, processes and standards as well as verification of certificates of analysis. We maintain a complete track of lot/batch numbers providing a full history of each raw ingredient in any given formula throughout the life of the lot/batch number.

Our Testing Methods and Equipment include:


Microbial Screenings
E coli
Staphylococcus aureus
Yeast & Mold
Total Coliforms
Total Aerobic Plate Count

Irradiation Detection
Pulsed Photo Stimulated Luminescence (PPSL)

Pesticide Screening
Gas Chromatography Mass Spectrometry (GC-MS)


Identity Confirmation
High Performance Thin Layer Chromatography (HPTLC)
Infrared Spectroscopy (Mid-FTIR)
Organoleptic Testing

Vitamin Assays
High Performance Liquid Chromatography (HPLC)

Mineral and Heavy Metal Assays
Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

Additional Capabilities
USP Tablet Disintegration
Moisture Analysis
ATP Screening
pH Determination
Stability Studies