And I'll bet you've had beef barley soup recently. But think back a bit. Mixing barley-water with milk is even more nutritional. Cooked barley made into a poultice is good for external sores. Linen has been used from very early times as a fabric.
Linseed oil comes from flax.
Hot pressed oil is used for wood finishes and artists' medium. The mineral-rich cold pressed oil is a traditional medicine for sore throat, constipation, and gall stones. It is also used for cooking. The ground seeds are used for flour. It is often an ingredient in multi-grain breads.