Vitamin C2

Vitamin C2 or Vitamin C2 is not a widely recognized term in modern scientific classification. However, it has been historically or erroneously used to refer to various substances, including:

  • A proprietary trademarked name for a combination of calcium ascorbate and ascorbyl palmitate, marketed as a blend of "water-soluble" and "fat-soluble" vitamin C.
  • Vitamin P, a historical term once used for certain bioflavonoids,[1] though they are not classified as true vitamins. This term was used circa 1948 or earlier.[1]
  • Vitamin J which was used circa 1935.[1] Vitamin J was an earlier term for choline.[2]
  • Aesculin (also known as Esculin), a compound sometimes referred to as "Vitamin C2" in older databases, though this designation is not widely accepted.

References

  1. ^ a b c Williams, Peter (2016). "The missing vitamin alphabet". Nutrition & Dietetics. 73 (2): 205–214. doi:10.1111/1747-0080.12212. ISSN 1446-6368.
  2. ^ "Vitamin J". TheFreeDictionary.com. Retrieved 2026-03-13.
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