Certified Organic (USDA): Certified organic means products have no prohibited pesticides or synthetic fertilizers. There is very strict criteria to follow if products have been labeled certified organic. That criteria must show that it will not have a negative impact on human health or the environment. ISO Certified: International Standardization Organization is located in Geneva, Switzerland. It looks for the same high quality in a plant as the USDA in the US does. The plants and oils derived must show that the plant was cultivated organically or grown wild in a clean environment. No chemical fertilizers were added to the soil and crop cultivation is free of herbicides and pesticides. The stringent testing will show that is has or has not the harmful properties.