You're not going to overdose vitamin D at 1000 IU. Do your own research, but the RDA is too low for people living in the northern hemisphere. I'm a computer pro

You're not going to overdose vitamin D at 1000 IU. Do your own research, but the RDA is too low for people living in the northern hemisphere. I'm a computer programmer living in Canada, I take 3000 IU a day. A good sun exposure can produce 50,000 IU, not all of which gets absorbed. If you have too much over a long period of time it can cause calcification. You're probably not going to experience that under 10000 IU a day. Again, do your own research. I'm not an expert in this field.