An essential nutrient is a nutrient that must be obtained from the diet because our bodies
cannot make it.
Fatty acid is a scientific term for fat, which refers to its chemical structure. ALA or alpha linolenic acid (omega 3) is an essential fatty acid.

Omega-3 are types of polyunsaturated fatty acids which are good fats. ALA (alpha linolenic acid), EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) are
omega 3 fatty acids. The different names refer to their different chemical structures.

No, margarine does not contain cholesterol. In fact, it may help reduce cholesterol.
Saturated fat can raise cholesterol levels in the blood and this can increase the risk of heart disease. The unsaturated good fats in margarine can actually help reduce cholesterol levels.
70% of people in the world have high cholesterol, 40% know about this, only a few take action.

Docosahexaenoic acid (DHA) is an omega-3 fatty acid. DHA is a building block of the
brain, like calcium is a building block of the bones. The body can make small amounts of DHA by converting ALA into DHA. This process is very slow therefore it is also important to get DHA from your diet.
DHA together with EPA is mainly present in fatty fish and breast milk. Many people do not manage to eat fatty fish once or twice a week and thus it is difficult to get enough EPA and DHA from foods.