Dietary fats

                   

Cholesterol

A type of fat.

Essential structural component of cells walls
synthesized by all animal & human cells

80% of blood cholesterol is synthesized by liver and 20% comes from dietary fats

It means even we totally avoid fats and oils in our diet, body will continue to synthesize it.
This is because it is needed to be in the cell walls, coverings of nerves.

It is a precursor for:

• steroid hormones, 
• vitamin D  
• bile acids

It circulates in blood as
LDL (bad cholesterol)
HDL (good cholesterol)




Does not provide energy (zero calories)


Food sources

Red meat
Egg yolk
butter

Triglycerides

Type of fat (lipid) 

Body converts excess of calories from food into triglycerides and stores in fat (adipose) cells.

It is deposited around the waist as abdominal fat and in the buttock

These stored fats are again converted into calories when body needs it

Triglycerides are fatty acids

Fatty acids
Saturated (SF)
Monounsaturated (MUFA)
Polyunsaturated (PUFA)
PUFA 6
PUFA 3
Both these oils are not synthesized in body and have to be supplied from food(essential oils)

PUFA 6 : PUFA 3 ratio should be less than 4. If more it is a risk for diabetes and heart disease.

Energy dense;
1G = 10 calories
           (Twice as carbs & proteins)

Food source


Excess calories from animal fats,nuts, refined sugar converted into TG