Ascorbic Acid Levels in Vitamin Pills

Özmen, İbrahim Asutay (2010) Ascorbic Acid Levels in Vitamin Pills. Other thesis, TED ANKARA COLLEGE FOUNDATION HIGH SCHOOL.

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Although it is generally accepted that a balanced diet without supplementation contains enough vitamin C, it is still the most widely taken nutritional supplement world-wide. The present study aims to answer the question “Does the amount of Vitamin-C is equal to the level shown on the box?” After a brief research I found that there were nineteen different tablets containing vitamin C in Vademecum (which is the Turkish National Formulary of drugs), and only two of them were in the form of pure Vitamin C tablets made by Roche and Polifarma in Turkey. On the other hand I was able to find Vitamin C tablets in over ten different brand names over-thecounter which were all being sold without a prescription, six of them were randomly selected for evaluation. Six different brand name of vitamin C sold as over-the-counter and two sold in pharmacy with prescription were analyzed using iodometric titration method based on an oxidation-reduction reaction between vitamin C and iodine. Results were compared to the amounts shown on the box and deviation was shown as mg and percentage. Vitamin C from Healthy America, Natural Wealth, Walgreens and CVS were found to include less than the amount shown on the box. Remaining four, including GNC and Mason Nature, over-the counter pills, and Polifarma C and Roche Redoxan, pills with prescription, were found to include more than the amounts shown on the box. The most reliable pills were from GNC and Polifarma respectively. The deviation was most in pills from Natural Wealth which was followed by Healthy America and CVS respectively. The content of vitamin C in the tablets was found to be different than the manufacturer’s specification in the prospectus with the mean deviation of 3.7%.Vitamin C from GNC and Polifarma with the deviation of 0.5% were most reliable ones.

Item Type: Thesis (Other)
Additional Information: Supervisor: Serenay Tarhan Güler IB Notu: B
Uncontrolled Keywords: Vitamin C; ascorbic acid; iodometric titration; tablets
Subjects: Q Science > QD Chemistry
Depositing User: Kamil Çömlekçi
Date Deposited: 10 Jun 2010 06:07
Last Modified: 12 Apr 2019 11:19

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