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Sources­

  • American Heart Association.
    http://www.americanheart.org/presenter.jhtml?identifier=4777
  • USDA
    http://www.mypyramid.gov/tips_resources/vegetarian_diets.html
  • Mayo Clinic
    http://www.mayoclinic.com/health/vegetarian-diet/HQ01596
  • Harvard School of Public Health
    http://www.hsph.harvard.edu/nutritionsource/protein.html