Research paper on vitamin a

The finding that biotin supplements were effective in treating hoof abnormalities in hoofed animals suggested that biotin might also be helpful in strengthening brittle fingernails in humans (39-41) . Three uncontrolled trials examining the effects of biotin supplementation ( mg/day for several months) in women with brittle fingernails have been published (42-44) . In two of the trials, subjective evidence of clinical improvement was reported in 67%-91% of the participants available for follow-up at the end of the treatment period (42, 43) . One trial that used scanning electron microscopy to assess fingernail brittleness reported less fingernail splitting and a 25% increase in the thickness of the nail plate in patients supplemented with biotin for 6 to 15 months (44) . Biotin supplementation (5 mg/day) was also found to be effective in controlling unruly hair and splitting nails in two toddlers with inherited uncombable hair syndrome (45) . Although preliminary evidence suggests that supplemental biotin may help strengthen fragile nails, larger placebo -controlled trials are needed to assess the efficacy of high-dose biotin supplementation for the treatment of brittle fingernails.

References:
[1] Whitney EN, Hamilton EMN. Understanding Nutrition, 4th ed. West Publishing, New York, 1987
[2] Airola P. How to Get Well. Health Plus, Sherwood (OR), 1989
[3] Olson JA. Vitamin A, retinoids, and carotenoids. In Modern Nutrition in Health and Disease, 8th ed. Lea & Febiger, Phil.,1994:287-307
[4] Farrell PA, Roberts RJ. Vitamin E. In Modern Nutrition in Health and Disease, 8th ed. Lea & Febiger, Phil.,1994:326-358
[5] DeCava JA. The Real Truth about Vitamins & Antioxidants. A Printery, Centerfield (MA), 1997
[6] The United States Pharmacopeial Convention. USAN and USP Dictionary of Drug Names. Mack Printing, Easton (PA),1986
[7] Turnland JR. Bioavailability of dietary minerals to humans: the stable isotope approach. Crit Rev Food Sci Nutr,1991;30(4);387-396
[8] Schumann K, et al. Bioavailability of oral vitamins, minerals, and trace minerals in perspective. Arzneimittelforshcung,1997;47(4):369-380
[9] Ha SW. Rabbit study comparing yeast and isolated B vitamins (as described in Murray RP. Natural vs. Synthetic. Mark R. Anderson, 1995, p:A3). Ann Rev Physiol,1941; 3:259-282
[10] Thiel R. Natural vitamins may be superior to synthetic ones. Med ;55(6):461-469
[11] Thiel , Fowkes . Can cognitive deterioration associated with Down syndrome be reduced? Medical Hypotheses, 2005; 64(3):524-532
[12] Traber MG, Elsner A, Brigelius-Flohe R. Synthetic as compared with natural vitamin E is preferentially excreted as alpha-CEHC in human urine: studies using deuterated alpha-tocopherol acetates. FEBS Letters, 1998;437:145-148
[13] Ross . Vitamin A and Carotenoids. In Modern Nutrition in Health and Disease, 10th ed. Lippincott William & Wilkins, Phil, 2005: 351-375
[14] Lucock M. Is folic acid the ultimate functional food component for disease prevention? BMJ, 2004;328:211-214
[15] Williams D. ORAC values for fruits and vegetables. Alternatives, 1999;7(22):171
[16] Thiel R. Vitamin D, rickets, and mainstream experts. Int J Naturopathy, 2003; 2(1)
[17] Traber MG. Vitamin E. In Modern Nutrition in Health and Disease, 9th ed. Williams & Wilkins, 1999:347-362
[18] Olson . Vitamin K. In Modern Nutrition in Health and Nutrition, 9th ed. Williams & Wilkins, Balt., 1999: 363-380
[19] Hamet P, et al. The evaluation of the scientific evidence for a relationship between calcium and hypertension. J Nutr, 1995;125:311S-400S
[20] Ensminger AH, Ensminger ME, Konlade JE, Robson JRK. Food & Nutrition Encyclopedia, 2nd ed. CRC Press, New York, 1993
[21] Wood ., Ronnenberg . Iron. In Modern Nutrition in Health and Disease, 10th ed. Lippincott William & Wilkins, Phil, 2005: 248-270
[22] Rude ., Shils . Magnesium. In Modern Nutrition in Health and Disease, 10th ed. Lippincott William & Wilkins, Phil, 2005: 223-247
[23] Biotechnology in the Feed Industry. Nottingham Press, UK, 1995: 257-267
[24] Andlid TA, Veide J, Sandberg AS. Metabolism of extracellular inositol hexaphosphate (phytate) by Saccharomyces cerevisiae. Int J. Food Microbiology. 2004;97(2):157-169
[25] King JC, Cousins RJ. Zinc. In Modern Nutrition in Health and Disease, 10 th ed. Lipponcott Williams & Wilkins, Phil., 2005:271-285

Research paper on vitamin a

research paper on vitamin a

Media:

research paper on vitamin aresearch paper on vitamin aresearch paper on vitamin aresearch paper on vitamin a