I did a bit of reading up on vitamin d supplementation and magnesium as it keeps getting brought up but nobody seems to be sure about the dosage of magnesium to the dosage of vitamin d3. I came across the site below, i’m not sure how legit the info is but it’s all referenced so you can decide for yourselves, but the information contained seems pretty good.
After reading this i think you would probably need to be supplementing about 500-700 mg of magnesium per day as well as calcium (which would vary depending on the amount of dairy in your diet) if you are supplementing vitamin d3
westonaprice.org/The-Miracle … min-D.html
here are some choice excerpts:
The Right Fats
The assimilation and utilization of vitamin D is influenced by the kinds of fats we consume. Increasing levels of both polyunsaturated and monounsaturated fatty acids in the diet decrease the binding of vitamin D to D-binding proteins. Saturated fats, the kind found in butter, tallow and coconut oil, do not have this effect. Nor do the omega-3 fats.66 D-binding proteins are key to local and peripheral actions of vitamin D. This is an important consideration as Americans have dramatically increased their intake of polyunsaturated oils (from commercial vegetable oils) and monounsaturated oils (from olive oil and canola oil) and decreased their intake of saturated fats over the past 100 years.
In traditional diets, saturated fats supplied varying amounts of vitamin D. Thus, both reduction of saturated fats and increase of polyunsaturated and monounsaturated fats contribute to the current widespread D deficiency.
Trans fatty acids, found in margarine and shortenings used in most commercial baked goods, should always be avoided. There is evidence that these fats can interfere with the enzyme systems the body uses to convert vitamin D in the liver.80
Vitamin D Therapy
Supplementation is safe as long as sarcoidosis, liver or kidney disease is not present and the diet contains adequate calcium, magnesium and other minerals.
Adequate calcium and magnesium, as well as other minerals, are critical parts of vitamin D therapy. Without calcium and magnesium in sufficient quantities, vitamin-D supplementation will withdraw calcium from the bone and will allow the uptake of toxic minerals. Do not supplement vitamin D and do not sunbathe unless you are sure you have sufficient calcium and magnesium to meet your daily needs. Weston Price suggested a minimum of 1,200-2,400 mg of calcium daily. Research suggests that 1,200-1,500 mg is adequate as a supplement for most adults, both men and women. (Magnesium intake should be half that of calcium.)
Two excellent sources of calcium in the human diet are dairy products and bone broths.2 If the diet does not contain sufficient amounts, you will need to add supplements.
Toxicity Issues
Abnormally high levels of vitamin D are indicated by blood levels exceeding 65 ng/ml or 162 nmol/l for extended periods of time and may be associated with chronic toxicity. Levels of 200-300 nmol/l or higher have been seen in several studies using supplementation and quickly resolve when supplementation is stopped. In such cases no long-term problems have been found. Long-term supplementation, without monitoring, may have serious consequences.
Dr. Vieth suggests that critical toxicity may occur at doses of 20,000 IU daily and that the Upper Limit (UL) of safety be set at 10,000 IU, rather than the current 2,000 IU. While this may or may not be the definitive marker for safety in healthy persons with no active liver or kidney disease, there is no clinical evidence that long-term supplementation needs to be greater than 4,000 IU for optimal daily maintenance. This level would be somewhat lower when combined with exposure to UV-B.3;76