How Much Vitamin D Is Too Much? A Case Report and Review of the Literature
Another concern with Vit D supplementation is magnesium.<p>As calcium and magnesium compete for absorption, Vit D’s effect of increasing calcium absorption can reduce magnesium absorption and lead to symptoms related to magnesium deficiency.<p>I gather the toxic effects described in the article are partly due to extreme magnesium deficiency along with other effects - though magnesium or other effects aren’t  mentioned in the paper, only acute toxicity symptoms.<p>But it can be an issue even at much more conventional levels of Vit D supplementation, as many people are already magnesium deficient due to it being difficult to absorb from foods.<p>As I’ve had evidence of Mg deficiency, I’ve been taking magnesium malate for a while, but am now looking at the more absorbable forms magnesium l-threonate and magnesium bisglycinate. At times I’ve taken a supplement that combines calcium, D3, magnesium and phosphorus, to keep these nutrients in balance.<p>Of course one should work with a health professional when considering taking dietary supplements.<p>Sources:<p><a href="https:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pmc&#x2F;articles&#x2F;PMC5652077&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pmc&#x2F;articles&#x2F;PMC5652077&#x2F;</a><p><a href="https:&#x2F;&#x2F;betteryou.com&#x2F;health-hub&#x2F;magnesium-other-vitamins-minerals&#x2F;" rel="nofollow">https:&#x2F;&#x2F;betteryou.com&#x2F;health-hub&#x2F;magnesium-other-vitamins-mi...</a>