Rainbow sheen on cold cuts: Harmless or health risk?
Cold cuts are a popular addition to sandwiches. However, doubts often arise about their freshness, especially when they have a rainbow sheen. Should you eat such ham, or is it better to discard it?
8:03 PM EST, November 18, 2024
Rainbow sheen on cold cuts
The discoloration on cold cuts, often called "fish scale," raises consumer concerns and can deter purchases. Some overlook it, others suspect it indicates chemicals, and some believe the cold cut is stale. Milena Głaz, a food technologist, clarifies the matter in a conversation with ABC Health.
– This phenomenon is related to the mechanical process the ham undergoes during slicing – she explains. – It causes changes in the structure of the meat. Muscle fibers on the surface of the cold cut become displaced. Additionally, the ham is exposed to light radiation, resulting in a diffraction process, which is the "bending" of light by small objects into the shadow area. The refracted light on the surface of the cold cut gives the impression of a "rainbow," – says the food technologist.
Therefore, such cold cuts can be consumed without major concerns.
When is cold cut unfit for consumption?
After purchasing or opening ham, we often wonder how long it will be safe to consume. Unfortunately, the expiration date isn't always a reliable guide. We must assess whether the product is spoiled using our senses. It's important to pay attention to the quality and visual appearance of the ham when shopping.
The first indication of a product's unfitness is its smell. The ham is not fit for consumption if there is an unpleasant, sour, or rotten odor. Another sign is a characteristic stickiness and color change. If the ham is not slightly pink but has a gray or green tint, it's a sign of expiration.
Mold is an absolute indicator that a cold cut should not be eaten. Even if mold appears on a small piece, the entire item should be discarded. Consuming even a small amount can lead to unpleasant health consequences.
