Vitamin B1- Thiamin

Question 1

What are sources of Vitamin B1?

Answer 1

-brown rice
-potatoes
-beans
-brussel sprouts

Question 2

Functions?

Answer 2

-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

Question 3

Deficiency?

Answer 3

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

Question 4

Excess?

Answer 4

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

Question 5

Factors affecting absorption?

Answer 5

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

Question 6

Effects of cooking and storage

Answer 6

-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