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Linseed, or flaxseed, has been quietly finding its way into piglet diets in recent years — not as a trend ingredient, but as part of a deeper rethink about how to support gut development and immunity after weaning. While it’s long been used to enrich pork fat with omega-3s, new studies suggest linseed can do more — especially for the youngest pigs, when their digestive system needs calm, stability and clean energy.