Palm oil hides on supermarket labels under more than 200 different names — from sodium lauryl sulfate to glycerol stearate — and most shoppers have no idea they're buying it in shampoo, chocolate and ice cream

Walk down the cleaning aisle of any Tesco or Whole Foods and pick up a bottle of shampoo. Somewhere on the back, in 4-point type, you will probably find sodium lauryl sulfate, the ...