How Much Sun Does It Take to Make Vitamin D?

Cod Liver Oil

I have been taking only 1 soft gel which has 1000 mg in each gel, but as i read on the bottle 1 soft gel only has 80 IU in it but also has vit. A and E and other Omega 3's also. This is a Carlson product. I would have to take 5 soft gels in order to get 400 IU's and I prefer not to take that many. I also take other supplements plus a multi. Vit.E, C. Calcium w/D, are the others. I do make sure I'm not over doing and get enough sun in the summer months only. I am in good health and 73 yrs young. I realize this is not a parenting question but I thought you might have some comments. Thanks!