Why Does Meat Sometimes Look Rainbow-Colored? (It’s Not Spoiled — It’s Science!)

Relax.

That rainbow sheen on your meat isn’t a sign of spoilage or food fraud.

It’s called “diffraction” — and it’s nature’s way of turning muscle fibers into a prism. 💡

Let’s break down why this happens, when you should worry, and why your lunch isn’t secretly a unicorn. 🦄

🔬 What Causes the Rainbow Effect on Meat?

The colorful glow you see is structural color, not pigment — much like the iridescence on a butterfly wing or a soap bubble.

Here’s how it works:

1️⃣ Tightly Packed Muscle Fibers 

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