Vitamin B1- Thiamin Flashcards

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1
Q

What are sources of Vitamin B1?

A

-brown rice
-potatoes
-beans
-brussel sprouts

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2
Q

Functions?

A

-release of energy from carbohydrates- thiamin acts as a co enzyme and this aids enzyme activity
-upkeep of nerves by supporting the growth of the myelin sheaths that surround them
-ensure proper muscle tone in the heart- keep heart healthy

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3
Q

Deficiency?

A

symptoms related to nerve dysfunction since the myelin sheaths wrapping nerves cannot be made without adequate thiamin- symptoms include pins and needles or numbness

-restarted growth
-fatigue, depression
-beri beri- nervous disease associated with loss of appetite, leads to reduced food intake and in time enlargement of the heart

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4
Q

Excess?

A

little/ no effect- water soluble- excess is excreted in urine

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5
Q

Factors affecting absorption?

A

-protein and amino acids protect thiamin in food
-starch aids absorption

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6
Q

Effects of cooking and storage

A

-soluble in water- 20% lost when potatoes are boiled
-decomposes at high temps, esp alkaline conditions, meat loses 40% when roasted
-long term refrigeration- result in substantial loss- green beans lose up to 90% of their original content after one years refrigeration
-lost in killing of rice- removal of grain- white rice

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