Distributed By?

Has anyone noticed that almost every product you buy these days has 'distributed by' on it instead of 'manufactured by'? Do Colgate and P&G not make their own toothpaste and just buy it from the Chinese or someone and distribute it? I would assume since they don't claim to manufacture it then someone else does and why is that? Look around at the products you have on the shelf and you will be amazed at how many don't have the actual manufacturer but the distributor's name on it. Sort of gives me an uneasy feeling...