mẫu slide thuyết trình về vitamin e

UNIVERSITY OF MEDICINE AND PHARMACY
IN HO CHI MINH CITY

GROUP 4: VITAMIN E



Vitamin E

Introduction

Chemical
Structure and
Classification

Does

Deficiency
and Toxicity


I.Introduction
Vitamin E is an antioxidant.
It may help protect your cells from damage.


This essential nutrient occurs naturally in many
foods.
It’s also available as a dietary supplement.
Sometimes, it’s in processed foods.
Vitamin E is fat-soluble.

You’ve probably seen rust on your bike or car.


A similar process of oxidation and accelerated aging
takes place in your body when cells are exposed to
molecules called free radicals.


Free radicals weaken and break down healthy
cells.


These molecules may also contribute to heart disease
and cancer.


Free radicals form as a result of normal body
processes.
They cause damage that shortens the life of your
cells.


Vitamin E is a powerful antioxidant that may
help reduce free radical damage and slow the
aging process of your cells, according to the
National Institutes of Health (NIH).

Researchers have investigated the use of vitamin
E as treatment for a variety of degenerative
diseases, including:
• hardening of the arteries
• high blood pressure
• heart disease
• cancer


Vitamin E may help people with higher
environmental or lifestyle risk factors.


Free radicals are increased by:
• cigarette smoking
• exposure to air pollution
• high exposure to ultraviolet rays from sunlight


Vitamin E may help repair damaged cells.


Chemical structure and classification
• Vitamin E is an oil-soluble vitamin. There are
two types of vitamin E: natural and synthetic.


• Vitamins of natural origin: extracted from
vegetable oils

Soybean

Maize
Barley seed


Oily seeds: sunflower seeds


• Vitamin E in nature consists of seven different
forms of tocopherol and tocotrienol


• Tocopherol: All tocopherols have the same
phthalocyanines



Vitamin E synthetic

It is not economically feasible to extract the natural foods, so
a synthetic vitamin E is produced. However, the effect of
Vitamin E synthetic is lower than that of natural origin.


DOSES
• If you eat a normal diet with
vegetable
oils,
green

vegetables, ensuring adequate
supply of vitamin E is not
difficult.
• Only
take
vitamin
E
supplements beyond 30 years of
age or when there is evidence of
vitamin E deficiency that can
not be provided through diet.


- Vitamin E supplements should only be applied
to those with dry skin, low in vitamin E diets.
- The need for vitamin E supplements is about :