How can you get Vitamin D3 if you are allergic to sheep wool?

Your own body produces vitamin D3 if your skin is exposed to sunlight. 10 minutes in the sun satisfies your daily need for vitamin D3. Vitamin D is also found in some foods, such as fish (especially cod) and eggs.

Another source says that getting enough vitamin D3 from the sun might be more difficult, depending on geographical location and season.

During an internet search, I did find that some people are allergic to vitamin D3 supplements. I don't know if this is because vitamin D3 can be made from wool.