Flaxseed, also known as linseed or linseed oil, is made from flaxseed that has been ground and pressed to release its natural oil. This health-promoting oil has many different uses, from cooking to skin care. Although current research is limited to in vitro and animal studies, there is some evidence that flaxseed oil may help reduce the growth of cancer cells. Several studies have shown that flaxseed oil can benefit heart health because it can also improve the elasticity of arteries. One of the best things about linseed oil and flaxseed is its versatility. For starters, it can easily be substituted for other types of oil in salad dressings, dips and sauces. You can also add a serving (one tablespoon or 15 ml) to smoothies or shakes to add some flaxseed oil to your diet with minimal effort.