Darkening

Darkening is the unwanted deepening of colour in foods during storage or processing, most visible when fresh meat turns from bright red to brown-grey. Shoppers often read redness as a freshness signal, so darkened product looks stale even when it remains wholesome and nutritious. The causes range from pigment oxidation to enzyme-driven browning, accelerated by light, warmth and oxygen. Packers counter it with oxygen-barrier films, antioxidants and careful temperature control. Understanding the chemistry helps everyone judge quality by facts rather than colour alone.