Cover Image

PAPERBACK
$99.00



View/Hide Left Panel
  • The RDA of folic acid and vitamin B12 should be sufficient to meet the body's requirement. Insufficient data exist to recommend otherwise.

  • Further studies should be done to determine the effects on vitamin status of long-term exposure to living and working in the heat.

  • During acclimatization, vitamin C intake should be about 250 mg per day to reduce heat stress and enhance acclimatization in those people who have adequate but low vitamin C status. Further study is warranted to confirm this recommendation and to determine whether supplementation may be effective in reducing heat stress in people with optimal vitamin C status.

  • Existing data show that vitamin C supplements may be needed for extended periods of living and working in hot environments. Further studies are needed to confirm this finding and to determine the amount of vitamin C needed to prevent a decrease in status.

  • There is no need to supplement vitamin D in hot environments.

  • Vitamin A (beta-carotene), vitamin C, and vitamin E function as antioxidants and may be useful as supplements in a hot environment. Further research is needed for confirmation.

REFERENCES

Adams, M.M., L.P. Porcello, and V.M. Vivian 1982 Effect of a supplement on dietary intakes of female collegiate swimmers. Physician Sportsmed. 10:122–134.


Belko, A.Z., E. Obarzanek, H.J. Kalwarf, M.A. Rotter, S. Bogusz, D. Miller, J.D. Haas, and D.A. Roe 1983 Effects of exercise on riboflavin requirements of young women. Am. J. Clin. Nutr. 37:509–517.

Bell, N.H., R.N. Godsen, D.P. Henry, J. Shary, and S. Epstein 1988 The effects of muscle-building exercise on vitamin D and mineral metabolism. J. Bone Miner. Res. 3:369–373.

Bergstrom, J., E. Hultman, L. Jorfeldt, B. Pernow, and J. Wahren 1969 Effect of nicotinic acid on physical working capacity and on metabolism of muscle glycogen in man. J. Appl. Physiol. 26:170–176.

Bieri, J.G. 1990 Vitamin E. Pp. 117–121 in Present Knowledge in Nutrition, M.L. Brown, ed. Washington, D.C.: International Life Sciences Institute.

Brotherhood, J.R. 1984 Nutrition and sports performance. Sports Med. 1:350–389.

Brouns, F., and W. Saris 1989 How vitamins affect performance. J. Sports Med. Phys. Fitness 29:400–404.

Brown, M.L. 1990 Thiamin. Pp. 142–144 in Present Knowledge in Nutrition, M.L. Brown, ed. Washington, D.C.: International Life Sciences Institute.

Bunnell, R.H., E. DeRitter, and S.H. Rubin 1975 Effect of feeding polyunsaturated fatty acids with a low vitamin E diet on blood levels of tocopherol in men performing hard physical labor. Am. J. Clin. Nutr. 28:706–711.



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement