Does cannabis sativa seed oil have THC?

I know that THC is the psychoactive compound found in the cannabis plant, but does cannabis sativa seed oil contain THC? I have seen it marketed as a health product, but I want to make sure I understand what I’m buying.

What are the most potent THC strains?

As an experienced cannabis user, I’m looking for strains with the highest THC content. Can you recommend some strains that are known to be extremely potent? Also, what are some potential side effects to be aware of?