How is THC measured?

I see seed companies advertising certain THC percentages....

My question is this.....

How is THC measured?

Try this, see if it clears up your question.
I found the link by Googling it.

https://www.rollitup.org/toke-n-talk/77491-truth-about-thc-percentages.html

Sangamon Skunk said:

I see seed companies advertising certain THC percentages....

My question is this.....

How is THC measured?

Click to expand...

Just to be clear, in many cases the ad copy THC percentages don't come from objective quantitative analysis.

They come more from the "rectal extraction" method of potency evaluation.