2. If the body can\'t tell the difference between the sources of vitamin C, then
ID: 151343 • Letter: 2
Question
2. If the body can't tell the difference between the sources of vitamin C, then which of the following would you buy given that each tablet is 200 mg. Rose hips (14 cents/tablet), ascorbic acid (5 cents/tablet), or "natural" vitamin C (10 cents/tablet)? 3. Is vitamin C a water-or fat-soluble vitamin? What is the difference between water-and fat-soluble vitamins? Which must you be more careful consuming and why? 4. Orange juice, a source of vitamin C, can be purchased in a variety of forms: canned, fro- zen, fresh squeezed, in cartons, and in powder. Discuss an experiment to test which is the best source of vitamin C at the lowest cost. Outline the detailed steps. What is the concentration of vitamin C in OJ and what is the minimum daily requirement?Explanation / Answer
1. Ascorbic acid (5 cents /tablets) is sufficient to your body requirements for vitamin c it is a water soluble nutrient acts as a antioxidant helps to protect cells from the damage caused by free radicals,used to make a substance called collagen.
2, a)vitamin C is a water soluble
b) Water soluble vitamins are soluble in water and easily observed by in to the body if u consume more than the need the excess will excreated not stored so it should be taken every day Eg: B &C
Fat soluble vitamins are absorbed in the small intestine once in the body, they are stored in liver and fatty tissue,,it can help your intestine liver heart and other parts to maintain optimal health, taking this vitamin every day is not needed because it will be stored Eg; A,D,E,K
c)Extra care should be taken while consuming these Fat soluble vitamins in excess because they stay in the body longer and more easily lead to toxicity.
3.Iodine titration method is used to compare the amount of vitamin c 3 different types of orange juices : homemade fresh juice, premium not from -concentrate ,frozen concentrate
Experiment:
The chemical name for vitamin c is ascorbic acid when iodine is combined with ascorbic acid in solution a chemical reaction takes place, in this chemical reaction ascorbic acid loses electrons which are transfered to iodine due to oxidation. the oxidised ascorbic acid turns to dehydroascorbic acid and iodine is reduced to iodide. you add indicator to the solution it is a soluble startch when iodine reacts with startch solution turns to blue black color if ascorbic acid is present react with iodine there is no change in colour in solution if u start with known concentration of iodine and carefully measure amount of iodine solution that you add you can calculate amount of ascorbic acid was present.
b) Citrus fruits are the best source of vitamin c at low cost
c) 0-6 months -40 mg/day
7-12 months- 50mg/day
1-3 years- 15 mg/day
4-8 years- 25mg/day
9-13 years -45mg/day
14-18 years- 65mg/day
19 years- 75mg/day
Pregnant 85 mg/day
Breast feeding- 120mg/day
Above 19 years-90mg/day.
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