Human milk popular: "You won't find it on any commodities exchange, but there is a booming trade in mothers' breast milk. The United States' largest non-profit milk banks distributed 745,300 fluid ounces (22,000 litres) last year - double the amount in 2000 - at a cost of $US2.6 million. Prolacta Bioscience, which is in it for profit, started marketing a breast-milk concentrate for $US48 an ounce. And some mothers are selling their own milk on the internet for $1 to $2.50 - more than a third less than milk from the big banks. Since January one popular website has listed more than 100 advertisements for human milk."