Biocare vitamin c powder contains magnesium ascorbate which is a low acid form of vitamin c produced by biocarersquos unique solvent free aeligfreeze driedaelig method it is free from additives and excipients this form of vitamin c is gentler on your stomach vegetarian amp vegan suitable for pregnancy amp breastfeeding provides a readily absorbable form of vitamin c and magnesium buffered low acid form of vitamin c to reduce stomach irritation magnesium ascorbate does not leach m