We moved to an ABC news investigation tonight an inside look as federal authorities hunt down fake products every -- items and American homes. Counterfeit brand sold us the real thing from medicine to... See More
We moved to an ABC news investigation tonight an inside look as federal authorities hunt down fake products every -- items and American homes. Counterfeit brand sold us the real thing from medicine to make up and ABC's David Muir is right here to show us the risk Davis. Well -- when so many of us think of counterfeit goods we think of those fake Rolex Watches the fake handbags but what we're talking about here tonight -- everyday products in your medicine cabinet in your shower. And what happens when we test. What's inside. You're about to watch as we take you on the inside come down here securities bought this year -- joined the elite teams who -- the -- are calling the people putting your family at risk. We team up with the -- we were given a firsthand look at products pulling American families every day. Do you think Americans. Would be shocked to know just how much of what they're buying is actually fake. I think most Americans have no idea. These -- from made in China the counterfeit Champloo -- bathroom -- the razors even the fake condoms. All of it takes a made with substandard materials what do you really putting your -- our investigations are showing you know having. Contaminants. Heavy metals so we decide to put some products to the test we had to a discount store to buy -- cosmetics at a bargain price. We take them to the left the 20/20 test. And as we wait for the results we're also on the streets of Phoenix where authorities are tracking another -- while we knew that something like -- red tile dysfunction anyway. That's right investigators say Viagra is one of the most common counterfeit medications sold in America. And Phoenix investigators reveal to -- what they found -- counterfeit Viagra pills just listen. -- -- -- -- -- -- The stuff you see the roads that's what gives discoloration -- -- -- it's -- We -- there as a customer working undercover buys from the man right there in the driver seat. Soon he is under arrest and object and our cameras roll they count the cash -- behind in his cause you know much -- 1002. Three 4042. All of those bills off the streets and the -- that tells with the results of that makeup. -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- It was an order of magnitude higher than where we should be. But the most frightening discovery -- really -- she told us category one carcinogen -- can be cancer cause if drilling isn't known carcinogen and so we can call. This is a major wake -- call. But we have one last stop -- would those results we go back to the store. We bought that make -- -- 120 and we're rolling right now. And you'll see how they explain those test results tonight and Estee Lauder the company that owns Matt telling us tonight about that make up we tested. They never even sold a case like that before they say the label simply stolen. And -- tell you later tonight we do everything from a popular baby carrier to an extension cord in your home. With a fake safety label on it that ignites. Right as the cameras -- you'll tell all of us what to do about it how to spot -- tips tonight OK David -- as -- -- much more tonight on a special 20/20 to catch a fake. 10 PM Easter.
This transcript has been automatically generated and may not be 100% accurate.