How Many mcg Is 1000 IU Equivalent to? Your Guide to Vitamin Conversions
•
4 min read
The conversion from International Units (IU) to micrograms (mcg) is not universal; for example, 1000 IU of vitamin D equals 25 mcg, but 1000 IU of vitamin A is approximately 300 mcg RAE. This critical difference means you must know the specific substance before attempting a conversion. This guide breaks down the essential conversions to ensure you can accurately interpret your vitamin and supplement labels.
