What Is Vitamin D1? The Truth About This Rarely Discussed Vitamin

# What Is Vitamin D1? The Truth About This Rarely Discussed Vitamin

## Summary

Vitamin D1 is actually not a distinct form of vitamin D as commonly understood, but rather a historical term that was once used to describe what we now know as a mixture of vitamin D compounds. In early vitamin D research, scientists incorrectly identified multiple "types" of vitamin D, labeling them D1, D2, D3, and so on. However, modern science has clarified that vitamin D1 was likely a contamination or mixture of vitamin D2 (ergocalciferol) with other substances. Today, the term "vitamin D1" is largely obsolete in scientific literature. When it was used historically, it referred to early crude extracts that contained various vitamin D compounds rather than a pure, distinct form. This historical misclassification serves as a fascinating glimpse into the evolution of nutritional science and our understanding of fat-soluble vitamins.

## Benefits

Rich in vitamins, minerals, and antioxidants, it supports overall wellness, from digestive health to immune function.

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