Are Lemons Dyed Yellow?

Oranges, lemons, limes and the like, accordingly, are often treated with artificial coloring matter or dyes to give them a yellow or orange color, as desired, to simulate the color ordinarily associated with mature, ripe fruit.

Do they dye lemons yellow?

Some food companies use turmeric (a yellow spice added to curry) and some use tartrazine, an artificial lemon-yellow dye derived from coal tar that may cause mutations in cell DNA.

What color are natural lemons?

All citrus fruits are green while they are still growing on the tree. Lemons lose their green colour as they ripen because the chlorophyll pigment is replaced with a chemical called anthocyanin. Many lime species would also turn yellow if you left them on the tree long enough, but they never get a chance.