When I watched it, one guy had purchased over 1000 tubes of toothpaste, someone bought 35 bottles of antacid, another couple had 48 bags of potato chips.
First off, all those health care items are dated and will expire, as is all the food. I don't know how a family of four will ever get through over 1000 tubes of toothpaste, or 35 bottles of antacid. Potato chips don't have a huge shelf life, so if you don't use them they will go stale. It would be interesting to know how much food and health care items they throw away because it goes out of date.
I saw this show once. In that one a couple of the people took the excess they got for free to the local food bank.