Buzz
Frequent recalls have given lettuce, especially romaine, a reputation for being unreliable. Many people, adopting a 'better safe than sorry' approach, often discard lettuce at the first sign of any flaw.
A common issue is the pink discoloration often seen in lettuce after a few days in the fridge. According to Eat or Toss?, this is typically caused by a stress response known as 'pink rib,' which occurs due to improper storage temperatures, aging, or other unfavorable conditions. While pink might seem unusual on a green vegetable, it’s not inherently a cause for concern.
Catherine Belisle, a Ph.D. student in horticulture at the University of Florida, conducted a four-week study on the development of pink rib in lettuce. She found no signs of decay from microorganisms or fungi. Although she notes that pinkish lettuce might have a slightly bitter taste, she personally finds it indistinguishable in flavor from unaffected lettuce.
In simpler terms, if your lettuce shows some pink areas but remains dry and crisp, it’s likely safe to eat. However, if it displays typical signs of spoilage—such as being wet, slimy, soft, or having a bad odor—it’s best to discard it. If the discoloration leans more toward brown than pink, it might be due to oxidation (similar to how apple and avocado slices brown) or exposure to ethylene, a gas emitted by certain fruits and vegetables that accelerates ripening in other produce. As Livestrong notes, brown spots on lettuce aren’t inherently harmful, but if they’re paired with issues like sliminess or an unpleasant smell, it’s better to avoid consuming it.
