THC, also called tetrahydrocannabinol, is the compound in cannabis that is psychoactive and gives you the feeling of being high. Delta-9-tetrahydrocannabinol or Δ-9-tetrahydrocannabinol (Δ-9-THC) is the best known form of THC, and the illegal form under the 2018 Farm Bill. THC stimulates the release of a neurotransmitter called dopamine in the brain, which is what causes feelings of euphoria. The effects on the body can vary from one person to the next and can result in feelings of happy euphoria or adverse experience affects as well as pleasurable ones. Delta-9 THC, being the best known form of THC, is considerably more potent than delta-8, reputedly about twice as strong overall, and as a result side effects can be more considerable too with delta-9, such as paranoia, mental fog, impaired motor skills, and increased feelings of anxiety. Delta-8 and delta-10 are both milder that delta-9 and produce a much easier, less intoxicating experience with many users feeling a great sense of calm and clarity with a definite “high” to the experience – but not enough to impair the ability to form coherent thoughts or focus on activities. Delta-8 brings a feeling of being more relaxed and less burdened by stress thus it has a more sedative affect and is best for a mellow relaxing evening. Delta-10 induces a more active, sativa-like high with an energizing, anxiety-reducing effect enabling you to  feel more productive and creative – effectively the daytime alternative to delta-8. Delta 8 and 10 also work more slowly as they ease a user into a more mellow experience state where as the delta-9 onset is more rapid with stronger and possibly more confronting results. Because it’s made from hemp, THC-O occupies a different legal status than other cannabis products due to THC-O being made from CBD derived from hemp and not cannabis strains with THC levels above 0.3%. CBD from hemp is put through a  conversion process to produce THC-O; effectively a sort of “synthetic” THC. Delta-O is significantly stronger than not only delta-8 and 10, but also regular delta-9 THC. Some consumers have reported a more spiritual high with strong effects that can even border on the hallucinogenic.