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No established efficacy dose. The human trial used 70 mL/day of 100% juice (~1050 mg vitamin C). Powders commonly provide 500-2000mg/day, supplying high vitamin C (expressed as vitamin C content; the trial used 70 mL juice ≈ 1050 mg vitamin C).
With meals · with food
Freeze-dried powder
~1 week
~1 week
Throughout use
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