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Table 2 Vitamin D3 content of custom-made trial tablets, based on postproduction coated tablet content analysis by high-performance liquid chromatographya

From: Maternal vitamin D supplementation during pregnancy and lactation to promote infant growth in Dhaka, Bangladesh (MDIG trial): study protocol for a randomized controlled trial

Label claim

Cholecalciferol content (% label claim)

Batch 1b (November 2013)

Batch 2 (April 2014)

Batch 3 (June 2014)

4200 IU

106 %

103 %

101 %

16,800 IU

105 %

101 %

102 %

28,000 IU

102 %

101 %

99 %

  1. aModified United States Pharmacopeia method, as reported by the manufacturer (Toronto Institute of Pharmaceutical Technology, Toronto, ON, Canada). Results shown reflect the batches completed and assayed at the time of manuscript preparation, not the full set of batches to be used in the trial.
  2. bSimilar results obtained in testing by independent third-party laboratory (Alpha Laboratories, Toronto, ON, Canada)