Companies have unleashed hundreds of CBD pet health products accompanied by glowing customer testimonials claiming the cannabis derivative produced calmer, quieter and pain-free dogs and cats.

But some of these products are all bark and no bite.

“You’d be astounded by the analysis we’ve seen of products on the shelf with virtually no CBD in them,” said Cornell University veterinary researcher Joseph Wakshlag, who studies therapeutic uses for the compound. “Or products with 2 milligrams per milliliter, when an effective concentration would be between 25 and 75 milligrams per milliliter. There are plenty of folks looking to make a dollar rather than produce anything that’s really beneficial.”

Such products can make it to the shelves because the federal government has yet to establish standards for CBD that will help people know whether it works for their pets and how much to give.

Still, there’s lots of individual success stories that help fuel a $400 million market that grew more than tenfold since last year and is expected to reach $1.7 billion by 2023, according to the cannabis research firm Brightfield Group.