Strange but true: mega-store are actually starting to offer less selection, fewer different products to choose from:

I have a regular complaint about the typical supermarket or drugstore these days: Too many brands and flavors and varieties are disappearing. The big manufacturers seem to be muscling out the smaller players, or retailers are yanking lower-volume products to make room for their own, more profitable private-label versions.

The exception seems to be toothpaste:

The result of all this is that today the average supermarket or drugstore carries nearly 84 different toothpaste items, according to market research firm Information Resources. That doesn't even include all the new whitening products on the market.

Read the whole article to learn why.