If you’ve been scammed by weight-loss schemes, Senator Claire McCaskill of Missouri wants to hear from you.

McCaskill is chair of the Senate Consumer Protection Subcommittee. She plans to hold hearings in a few weeks into scams that she says are costing Americans billions of dollars. She points to Sensa, a powder that is supposed to make you lose weight if you sprinkle it on your food, and Oxi-tain, a topical cream that supposedly leads to weight loss.

If you have a weight-loss scam to report, go here and click on Scam Tell Claire.