Is Vitim an a Really a Vitamin?

The vast majority of Americans are deficient in vitam an a, which is one of the most important nutrients. The conversion rate from precursor to active form varies tremendously from person to person. Some people do better eating animal products because they have more active forms like hemironan and ratinal for vitemine. And although high doses can be toxic at high doses, it's rare to see any toxicity rather than just high doses of vitemnanall.