From which plant does linseed oil come?

Flax is a type of flowering plant from which linseed oil can be made. Also known as flaxseed oil or flax oil, the clear, yellowish liquid is obtained from the seeds of the plant. Linseed oil is an edible oil and can be found in dietary supplements, particularly those containing omega-3.

Linseed oil is also used in some paints and varnishes, however, the oil can dry and solidify quickly, so must be stored in an airtight container. In oil paints, linseed oil increases the fluidity of the paint and adds a glossy sheen to the colour.

Wooden furniture, particularly those used outside such as benches, are treated with linseed oil to protect them from the weather. The oil seeps into the pores of the wood, allowing the natural grains to show through. Linseed oil is also used to coat wooden cricket bats, snooker cues, guitars, and other wooden instruments.

Linseed oil is not generally recommended for use in cooking, although it is safe for human consumption. According to nutrition information from the Flax Council of Canada, one tablespoon (14g) of linseed oil contains 126 calories.

Flax grows in many countries across the world, with Kazakhstan, Canada, Russia and China being among the top producing countries. Cultivated flax plants grow up to 1.2 m (3 ft 11 in) and produce pale blue flowers.