Vitamin D, also known as “sunshine vitamin” is a group of fat-soluble compounds. The most important ones for human bodies are vitamin D2 and vitamin D3. D2 naturally is present in plants, while D3 is synthesized by our organisms when we are exposed to sun rays. Actually, vitamin D should be seen more as a hormone than a vitamin. It is synthesized in our skin, but it is actually activated in a different place in our bodies – liver and kidneys.
Vitamin E is a fat soluble vitamin and the main antioxidant present in our bodies. It is a group of compounds that include tocopherols and tocotrienols. It’s probably best known for its free radical fighting properties. We can get this vitamin from natural sources (in which case it works much better), but it is also possible to synthesize it.