Unsaturated fat

Unsaturated fat is a kind of fat. It is different from saturated fat in that it is liquid at room temperature while saturated fat is more solid. Its molecules contains double bonds whose carbon atoms that are not fully saturated with hydrogen. There are two types:

  1. Monounsaturated; or those with one double bond
  2. Polyunsaturated; or with more than one double bond

In cellular metabolism, an unsaturated fat molecule contains somewhat less energy (that is fewer calories) than the saturated fat molecule of the same length.

Examples of unsaturated fats are palmitoleic acid, oleic acid, myristoleic acid, linoleic acid, and arachidonic acid. Foods containing unsaturated fats include avocado, nuts, and vegetable oils such as canola and olive oils. Meat products contain both saturated and unsaturated fats.

Health

Unsaturated fat is better for people than saturated fat. Some testing has shown that it can raise a person's HDL ("good" cholesterol) levels.[1] Unsaturated fat is also very important for a healthy brain.

People think that unsaturated fats are 'healthier' than saturated fats.[2] The United States Food and Drug Administration (FDA) recommended that the amount of unsaturated fat consumed should not exceed 30% of one's daily caloric intake (or 67 grams given a 2000 Calorie diet). The new dietary guidelines have got rid of this recommendation at the request of the meat and dairy industries.

Most foods contain both unsaturated and saturated fats. Food packages promote only one or the other, depending on which is the largest share in the product. Various unsaturated fat vegetable oils, such as olive oils, also contain saturated fat.

References

  1. ↑ "The effects of polyunsaturated fat vs monounsaturated fat on plasma lipoproteins. Smoking in older women: is being female a 'risk factor' for continued cigarette use?". www.readabstracts.com.
  2. ↑ "BBC Health], retrieved June 6, 2007". Archived from the original on April 23, 2008. Retrieved November 1, 2011.


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