The pink to reddish-brown pigments that develop on pieces ... How Can You Tell If Lettuce Has Gone Bad Or Has Spoiled? Lettuce, says Dr. Sargent is living tissue and as such, it begins to age ...

You might pull lettuce from the fridge only to find it limp, slimy, brown, or just plain past its prime. Head lettuces can last a while, but leaf lettuces often spoil quickly, giving you the ...