Hemp, according to the Department of Agriculture, is the “the plant Cannabis sativa L. and any part of that plant, including the seeds thereof and all derivatives… with a delta-9 tetrahydrocannabinol concentration of not more than 0.3% on a dry weight basis.” Which is to say, it’s cannabis with less than 0.3% THC—the compound responsible for making a user feel high. So theoretically, any product derived from hemp—whether a salad topping or a sleep-aid—should be fair game.

But the Department of Defense issued a letter (pdf) in February stating that since urinalysis testing would not be able to distinguish between THC from legal products and THC from illicit products, the military would ban the use of even hemp-derived CBD for active and reserve members of the US military. The department made exceptions for FDA-approved prescription drugs such as Epidiolex and apparel such as five-toed hemp shoes.

📬 Sign up for the Daily Brief

Our free, fast, and fun briefing on the global economy, delivered every weekday morning.