Trans fat, or trans-fatty acid, is a type of unsaturated fat that has been chemically altered through a process known as hydrogenation. It has been widely used in the food industry for decades due to its ability to increase shelf life and improve texture and flavour stability in processed foods. However, trans fat is now considered one of the most harmful dietary fats for human health.
There are two types of trans fats: naturally occurring and artificial. Naturally occurring trans fats are found in small amounts in the meat and dairy products of ruminant animals such as cows and sheep. These are produced by bacteria in the stomachs of these animals. Artificial trans fats, on the other hand, are created industrially by adding hydrogen to liquid vegetable oils, turning them into solid or semi-solid fats—commonly known as partially hydrogenated oils.
Artificial trans fats became popular in the early 20th century and were a staple in margarine, baked goods, snacks, and fast food. They were inexpensive to produce, had a long shelf life, and provided a desirable texture. For example, they helped make cookies crispier and doughnuts fluffier. However, despite their industrial benefits, the health risks associated with trans fats soon became apparent.
Scientific research has shown that trans fats raise low-density lipoprotein (LDL) cholesterol—commonly referred to as “bad” cholesterol—while simultaneously lowering high-density lipoprotein (HDL) cholesterol, or “good” cholesterol. This harmful combination significantly increases the risk of heart disease, stroke, and type 2 diabetes. The World Health Organization (WHO) has estimated that hundreds of thousands of deaths worldwide can be attributed annually to trans fat consumption.
In response to these findings, many governments took action. In Canada, for example, Health Canada banned the use of partially hydrogenated oils—the main source of industrially produced trans fats—as of September 2018. Similar bans have been implemented in the United States, the European Union, and several other countries. These regulations have led to a dramatic decrease in trans fat levels in many processed and packaged foods.
Consumers are now encouraged to check food labels carefully. In many countries, including Canada, nutritional labels must list trans fat content. However, products can sometimes be labelled “trans fat-free” if they contain less than 0.5 grams per serving, so it is wise to read ingredient lists for terms like “partially hydrogenated oil.”
Replacing trans fats in the diet is relatively easy. Healthier fat alternatives include monounsaturated and polyunsaturated fats, found in foods like olive oil, avocados, nuts, and fish. These fats can improve heart health when used in place of trans fats or saturated fats.
No comments:
Post a Comment