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Nutritional SupplementContents Certified NSFDye FreeGluten FreeVegetarianTheraCal D2000 is a nutritional supplement designed to support bone health.Formulated by Rheumatologists. Four daily tablets provide 50 mcg (2 000 IU) of vitamin D3 to maintain a healthy vitamin D level along with calcium citrate for optimal absorption magnesium vitamin K2 and boron.Independently content-certified by NSF® International.