Low Vitamin D is a sign of an underlying problem that needs to be corrected. Getting to the root of that issue is wise.
I do not ever recommend taking a D3 supplement. D3 is not actually a vitamin, but rather a hormone and the supplements are synthetic meaning the body does not see the D3 as bio-identical.
Why is this a problem?
Because synthetic hormone D3 will severely deplete your magnesium levels. This is the last thing you want to do when you have mineral imbalances from Biotoxin Illness due to breast implant illness. It is true that good D3 levels are important, but there are other ways to more naturally boost these levels.
1. Get a HTMA to determine your mineral status. If needed I’ll recommend Cod Liver Oil for boosting Vitamin D while also working to balance your other minerals. The Vitamin D in Cod Liver Oil is well balanced with Vitamin A (retinol) which is needed to make D more effective.
2. The secret to increasing chronically low Vitamin D levels is to become magnesium "efficient" through mineral balancing. This will naturally boost D3 levels. Once your minerals are balanced and optimized, the D level stays wonderfully healthy.