How many carrots do you need to eat to turn orange?

It would take a lot of carrots to turn your skin yellow/orange. It appears that the carotene is best absorbed if the dark green and orange foods are cookied, pureed or mashed. This breaks open the membranes of the plant cells and makes the carotene more absorbable. Foods known to cause carotenemias include, green beans, supplements,
papaya, asparagus, broccoli, carrots, cucumbers, lettuce,squash, apples, peaches, prunes, tomatoes, yams, butter, eggyolks, milk, and yellow corn.

I found one case study of a 32 year old female who had yellow discoloration of her skin and she was eating a dozen oranges every day along with greens and sweet potatoes. After she modified her diet the skin reverted back to her normal color.

Source:Indian J Dermatol 54; Supplement, January-March 2009