What is all the fuss about trans fatty acids?

摘要

Trans-monounsaturated fatty acids are found in the food supply from either ruminant fats or industrially produced sources.Conjugated linoleic acid(c9,tll-18:2;CLA),from ruminant fats(from cattle,sheep and goats),is another type of trans fatty acid found in foods.The amount of trans fatty acids from ruminant lipids is less than 5% of total fatty acids for the trans-monounsaturated type and less than 1 % for CLA.The level of trans-monounsaturated fatty acids in manufactured foods is largely unknown in this country;however,a recent survey showed the levels varied from 0.5% to 22.5% of total fatty acids in 55 foods tested.Data is emerging to show that trans-monunsaturated fatty acids raise blood cholesterol levels even more than saturated fat.This evidence should be sufficient for mandatory labelling of foods for trans fatty acids,as is the case in some other countries.