The 0.3% THC thing is just the legal standard/threshold which differentiates if a cannabis plant/product is classified as federally legal Hemp (below 0.3% THC) or if it's federally illegal Marijuana (anything above 0.3% THC). There was a Canadian research paper from about 15 years ago, and in it they chose 0.3% THC as the cutoff line if the cannabis got someone high or not. It's highly inaccurate (there are many other factors at play), however they had to choose a number for the purpose of the article and it's what they chose. However, since it was the only credible source of information at the time (since it was a published journal article), when the USDA legalized Hemp in the US in the 2014 Farm Bill, they adopted this 0.3% threshold for plants & products. As arbitrary as it may be, it's pretty much the standard now. There are people and organizations trying to lobby it up to 1%, which would probably be more accurate, but only time will tell if it ever gets amended. In most other countries where CBD is legal, the cutoff is 0.2% such as in Canada and Europe. Here's a slightly outdated but still accurate list of CBD legalities in other countries: https://hemppedia.org/legal-status-cbd-world/ Since we only produce Full Spectrum CBD Oil (as it's been proven to be most effective), we do have a very minor amount of THC. With CBD Isolate based products (which are the dominant portion of products on the market), it is removed by using harsh chemicals, and makes a less effective and inferior product. We have a ton of information on our catalog page about CBD and our products in particular, completely unbiased and derived from credible books, relevant research journal articles and most importantly feedback from our customers over the last 5 years, which is the most reliable information out there because the proof is in the pudding as they say. https://vermontpurecbd.com/catalog/