How we can make this claim?

StellarCBD’s chromatographic purification process has been able to selectively remove the only psychoactive component, Delta 9-THC, from the phytocannabinoid-rich hemp oil. The absence of detectable THC is confirmed through High Performance Liquid Chromatography (HPLC) tests and the State of Colorado. This allows us to identify the naturally occurring THC and separate it out, instantly, while leaving intact the other synergistic components of the oil. Our Manufacturer has been certified by the CDPHE (Colorado Department of Public Health and Environment) as a producer of 0.0% THC products and has been issued Free Sale Certification.