A good quality product will start with the finest raw materials and ingredients available in the marketplace. There are many grades of raw materials available for nutritional product manufacturers. Active ingredients may vary according to where the plant was grown, what part of the plant is being used, how the plant was harvested , and even how the plant was stored.
Some harvests can have many more contaminants and impurities than others.
Herbal ingredients should be stored where humidity is low and away from heat. This helps to maintain potency and avoid mold or other contamination. Testing should also be done to assure the Assay standard is correct. Testing of finished products to include shelf life of months and years. Low Temperature or Cold-Processing to avoid overheating from friction in processing.