Name: 9.3 維生素：維生素E (9.3 Vitamins: Vitamin E)
Uploaded: 2021-01-14T05:45:48.000Z
Duration: 4 min 41 s
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- WELCOME TO THE THIRD SECTION  IN OUR SERIES ON VITAMINS.

AND THIS SECTION IS GOING TO BE  ON VITAMIN E.

WE'RE GOING TO START WITH  THE FUNCTION OF VITAMIN E,

IT'S MAIN FUNCTION THAT I WANT  YOU TO KNOW

NOW, WE REVIEWED ANTIOXIDANTS  AT THE BEGINNING OF THE COURSE,

AND WHAT IT'S REPRESENTING IS  THIS HERE AS A FREE RADICAL

CAUSING DESTRUCTION IN  ESSENTIALLY A CHAIN REACTION.

NOW, REMEMBER FREE RADICALS  ARE VERY UNSTABLE

AND THEY CAN BIND TO DNA,  THEY CAN BIND TO SOME MEMBRANES,

AND WE THINK OF THIS  DOMINO EFFECT RIGHT HERE,

THE GOAL WITH ANY ANTIOXIDANT IS  TO BASICALLY BLOCK PROGRESSION

AND IT DOES THIS BY QUENCHING  THE FREE RADICAL,

OR THINK ABOUT IT NEUTRALIZING  THE FREE RADICAL.

THEN THAT FREE RADICAL WON'T  WANT TO BIND TO STRUCTURES

SO VITAMIN E IS AN ANTIOXIDANT,  QUENCHES FREE RADICALS

AN OXIDATIVE DAMAGE  IS THE DAMAGE THAT OCCURS

AS COMING FROM SUNFLOWER SEEDS,  ALMONDS,

AND IT CAN BE IN OTHER SEEDS,  AND NUTS AS WELL,

JUST NOT IN AS HIGH OF A SOURCE,  SPINACH AND THEN AVOCADO.

AND I WANT TO POINT OUT ASIDE  FROM THIS SPINACH

WE CAN SEE THE AVOCADO, ALMONDS,  AND SUNFLOWERS THERE.

AND REMEMBER WE'RE STILL ON  FAT SOLUBLE VITAMINS.

SO WHEN YOU'RE OBTAINING  A FAT SOLUBLE VITAMIN

AND NATURE IS IN GENERAL GOING  TO OCCUR WITH SOME TYPE OF FAT

AND THAT'S GOING TO ASSIST  IN ABSORPTION, YOU KNOW,

FROM THE DIGESTIVE TRACK  INTO THE BLOODSTREAM.

YOU NEED FAT FOR ABSORPTION  AND HERE ARE A FEW SOURCES.

WE GENERALLY DON'T SEE  VITAMIN E DEFICIENCY.

BUT YOU CAN SEE A LOSS OF MUSCLE  COORDINATION AND REFLEXES.

THERE CAN BE IMPAIRED VISION  AND SPEECH.

IS SOMETHING CALLED  ERYTHROCYTE HEMOLYSIS,

AND WHAT THAT MEANS,  ERYTHROCYTE IS A RED BLOOD CELL,

AND HEMOLYSIS BASICALLY MEANS  THAT IT'S BREAKING APART.

YOU CAN THINK OF IT ALMOST LIKE  IT'S EXPLODING.

A MEMBRANE CAN'T HOLD  THE CELL TOGETHER.

WHEN THAT HAPPENS IT'S JUST  GOING TO FALL APART.

SO THAT CAN HAPPEN IN INFANTS.  AGAIN, IT'S NOT THAT COMMON.

THAT'S NOT SOMETHING THAT YOU  GENERALLY SEE IN ADULTS.

AND THEN BECAUSE VITAMIN E  IS AN ANTIOXIDANT,

LOW LEVELS OF IT,  NOT NECESSARILY DEFICIENCY,

AGAIN, FROM FOOD  YOU'RE NOT GOING TO SEE IT.

YOU'RE NOT GOING TO EAT SO MANY  ALMONDS OR IN SUNFLOWER SEEDS

THAT YOU END UP WITH  VITAMIN E TOXICITY.

BUT THERE ARE A LOT OF PEOPLE  WHO SUPPLEMENT WITH VITAMIN E,

AND WHAT'S REALLY INTERESTING  IS THAT STUDIES HAVE SHOWN

AND RECENT STUDIES HAVE SHOWN  THAT VITAMIN E SUPPLEMENTS

ACTUALLY ARE ASSOCIATED  WITH INCREASED MORTALITY RISK.

AND IT'S BECAUSE WHEN THIS WAS  STUDIED FIRST

RECOGNIZED THAT VITAMIN E  IS AN ANTIOXIDANT

AND VITAMIN E MIGHT REDUCE THE  RISK OF CARDIOVASCULAR DISEASE

THE IDEA IS TO SUPPLEMENT  WITH VITAMIN E

TO SEE IF IT REDUCES THE RISK  OF CARDIOVASCULAR DISEASE.

INSTEAD WHAT THEY FOUND IS THAT  IT ACTUALLY INCREASED MORTALITY

SO IT IS RECOMMENDED NOT TO  SUPPLEMENT WITH VITAMIN E.

THAT IT DOESN'T HAVE  A VERY HIGH DOSE OF VITAMIN E.

AND THAT'S THE END OF OUR  DISCUSSION ON VITAMIN E.

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9.3 維生素：維生素E (9.3 Vitamins: Vitamin E)

chronic

essentially

recognize

recommend