Putting a stop to harmful trans fats
In particular, trans fats are found in products such as margarine, cakes, biscuits and crisps, and they come into being when oils and fats undergo partial hydrogenation. The aim of this process is to give the oils and fats melting properties that adjust the melting point of the end-product so that, for example, chocolate melts in the mouth and not in the hand. Unlike the conventional process of partial hydrogenation, new enzyme technology offers the possibility of obtaining these melting properties without at the same time producing harmful trans fats.
As well as enzymes, there are currently two other methods of adjusting the melting point of fats: hydrogenation and chemical interesterification. Both have unwanted side-effects. The first produces trans fats, while the second has a negative impact on the environment and leads to discolouring of the fat, which means that further processing is required.
Nutrition experts have been warning about trans fats for years, and around the world the authorities are now beginning to follow up on the recommendations with new legislation. In the USA, the content of trans fats has to be stated on all product labelling. Denmark has effectively banned the use of partial hydrogenation by setting a low upper limit for the amount of trans fats in foods. And Canada, which already has a trans fat labelling rule, is now considering adopting rules similar to those in Denmark. However, until legislation is in place, consumers need to be aware of their intake of trans fats if they want to avoid increasing the risk of cardiovascular disease.
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