LIPIDS

LIPIDS
Lipids include fats, oils, waxes, cholesterol, other sterols, most steroids.
In the body, fat serves as a source of energy, a thermal insolator and cushion around organs, and an important cellular component.
LIPIDS
LIPIDS
With lipids, some foods become tasty, attractive  Lipids increase sensory value of foods.
The fat-soluble vitamins are A, D, E and K.

Since fats have 2.25 times the energy content of carbohydrates and proteins, most people try to limit their intake of dietary fat to avoid becoming overweight.
Therefore, the food industry has a big market for low-fat and non-fat foods.
Clip about structure of fatty acid, glycerol and lipid.


If all the bonds are single, the fatty acid molecule is saturated. Ex: tallaw, lard, butter…
If there is a double bond among the carbon atoms, the fatty acid molecule is unsaturated. Ex: corn oil, cottonseed oil…
And if there are multiple double bonds (two or more), it is called polyunsaturated.
Some important food sources of 18-carbon (C18) fatty acid:

C18:0  stearic acid is a fully saturated fatty acid.
Some important food sources of 18-carbon (C18) fatty acid:

C18:1 has one double bond between C9-C10 counting from the COOH end  oleic acid (omega-9 fatty acid).
The symptoms of omega-9 deficiency
Bumps
Dry skin
Dry eyes
Dandruff
Hairloss
Irregular heart beat
Male sterility
Miscarriage
Irregular heart beat

Male sterility Miscarriage
Food sources of omega 9 fatty acid
Olive oil - the best source of omega 9
Olives
Avocados
Almonds
Peanuts
Sesame oil
Pecans
Pistachio nuts
Cashews
Hazelnuts
Macadamia nuts
Some important food sources of 18-carbon (C18) fatty acid:

C18:2 has two double bonds between C9-C10 and C12-C13  linoleic acid (omega-6 fatty acid).
Some important food sources of 18-carbon (C18) fatty acid:

Some important food sources of 18-carbon (C18) fatty acid:
There are two critical omega-3 fatty acids, (eicosapentaenoic acid, called EPA and docosahexaenoic or DHA), that the body needs. EPA and DHA are the building blocks for hormones that control immune function, blood clotting, and cell growth as well as components of cell membranes.
Together, omega-3 and omega-6 fatty acids play a crucial role in brain function as well as normal growth and development, they also reduce cardiovascular problems.
Omega-3 is found in fish oil and fat of tuna, salmon…
And food sources of omega-6 include vegetable oil (soybean oil, palm oil…), cereals and other seeds.
Some important food sources of 18-carbon (C18) fatty acid:
Polar lipids, serve as specialized surfactants known as emulsifiers. Lecithin is a phospholipid, which functions as a surfactant. Chemical properties of lecithin are used in the food industry to prevent fats from separating out of chocolate, mayonnaise, peanut butter, and salad dressings.
Special Application of lipids
Fat plays an important role in our diets. However, if you eat fat too much, it’s easy to get a higher risk for health problems. That is the Consequences from eating more fat.
Overweight and Obesity – Health consequences.
Obesity makes people shame and complex. Obesity is worse than a cosmetic problem, it is a health hazard.
LIPIDS
So Yummy (:P
DON’T LOSE YOUR CON-TROL !!!
!!! WARNING !!!
Obesity V.S Health
Other diseases and health problems link to obesity include:
Gallbladder disease
Liver disease.
Heart diseases
Diabetes
Cancer
Breathing problems
Arthritis
Reproductive complications
LIPIDS
Therefore, we should balance fat in the daily meals to minimize the risk which to contract diseases were mentioned above.
THANK YOU VERY MUCH !