Because vitamin D plays an important role in calcium absorption and bone metabolism, getting enough is crucial for maintaining strong bones. Although many symptoms of excessive vitamin D are attributed to high blood calcium levels, some researchers suggest that megadoses may lead to low levels of vitamin K2 in the blood To protect against bone loss, avoid taking excessive vitamin D supplements and take a vitamin K2 supplement.
You can also eat foods rich in vitamin K2, such as grass-fed dairy and meat. Summary Although vitamin D is required for calcium absorption, high levels may cause bone loss by interfering with vitamin K2 activity. In one case study, a man was hospitalized for kidney failure, elevated blood calcium levels, and other symptoms that occurred after he received vitamin D injections prescribed by his doctor Indeed, most studies have reported moderate-to-severe kidney injury in people who develop vitamin D toxicity 9 , 12 , 13 , 14 , 16 , 17 , In one study in 62 people who received excessively high-dose vitamin D injections, each person experienced kidney failure — whether they had healthy kidneys or existing kidney disease Summary Too much vitamin D may lead to kidney injury in people with healthy kidneys, as well as those with established kidney disease.
Vitamin D is extremely important for your overall health. Even if you follow a healthy diet, you may require supplements to achieve optimal blood levels. Make sure to avoid excessive doses of vitamin D.
Generally, 4, IU or less per day is considered safe, as long as your blood values are being monitored. In addition, make sure you purchase supplements from reputable manufacturers to reduce the risk of accidental overdose due to improper labeling.
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Vitamin D actually functions as a hormone, and deficiency is incredibly common. There are four fat-soluble vitamins in the human diet: A, D, E and K. Excessive thirst, an altered level of consciousness, high blood pressure, calcification in the kidney tubes, kidney failure, or hearing loss may also develop 4 , Hypercalcemia caused by regularly taking high amounts of vitamin D supplements may take a few months to resolve.
This is because vitamin D accumulates in body fat and is released into the blood slowly 4. Treating vitamin D intoxication includes avoiding sun exposure and eliminating all dietary and supplemental vitamin D.
A doctor may also correct your calcium levels with increased salt and fluids, often by intravenous saline. The main consequence of vitamin D toxicity is hypercalcemia, with symptoms including nausea, vomiting, weakness, and kidney failure.
Treatment involves limiting all vitamin D intake and sun exposure. Large doses of vitamin D can be harmful, even though there may not be immediate symptoms of toxicity. Vitamin D is very unlikely to cause severe symptoms of toxicity right away, and symptoms may take months or years to show up. There have been reports of people taking very large doses of vitamin D for months without symptoms, yet blood tests revealed severe hypercalcemia and symptoms of kidney failure The harmful effects of vitamin D are very complex.
High doses of vitamin D can cause hypercalcemia without toxicity symptoms, but can also cause toxicity symptoms without hypercalcemia To be safe, do not exceed the 4, IU mcg upper limit without consulting a doctor or dietitian.
Vitamin D toxicity usually develops over time, and the harmful effects are very complex. Large doses may cause damage, despite a lack of noticeable symptoms. It has been hypothesized that two other fat-soluble vitamins, vitamin K and vitamin A, may play important roles in vitamin D toxicity. Another nutrient that may be important is magnesium.
Taking vitamin A, vitamin K, and magnesium with vitamin D may therefore improve bone function and reduce the chances of other tissues becoming calcified 34 , 35 , These may reduce the risk of adverse effects from a higher vitamin D intake. People respond very differently to high doses of vitamin D. Vitamin D toxicity can have devastating health effects, which may not show up until months or even years after starting to take high doses.
Larger doses have not been linked with any additional health benefits, and may therefore be completely unnecessary. An occasional high dose of vitamin D is sometimes used to treat a deficiency, but always consult with a doctor or dietitian before taking a large dose.
Vitamin D is very important for your health, but it is possible to get too much of it. This article explores 6 side effects of taking too much vitamin…. Here are eight symptoms that may indicate you have a vitamin D deficiency, as well as causes, treatments, and more. Ultimately, this can cause kidney stones and may contribute to heart damage. To diagnose vitamin D toxicity, a physician will administer a blood test that will show how much calcium is in the blood.
If a person has vitamin D toxicity, then calcium levels will be abnormally high. Ross notes that taking consistently high levels of vitamin D over long periods of time may not cause apparent toxicity in the short term, but may contribute to a higher risk of common symptoms further down the line.
If a person shows signs of vitamin D toxicity, the first step toward treating it is to immediately stop taking any and all vitamin D and calcium supplements , as well as reducing intake of foods rich in vitamin D like salmon and cod liver oil. Doctors may also administer medications to help the body metabolize less vitamin D and pass more calcium. You may also be prescribed bone resorption inhibitors. These medications are usually used to treat osteoporosis because they prevent the release of calcium into the bloodstream.
However, Price's research has shown that bone resorption inhibitors may also prevent acute episodes of vitamin D toxicity. These inhibitors, he says, could be useful to prevent calcification of soft tissue in patients who, for health reasons, can't reduce their intake of vitamin D. For most people, though, the answer will be to simply stop your supplements, which will allow your body to process the excess calcium and, over weeks or months , return to normal.
Vitamin D is a nutrient that helps your body absorb and regulate calcium. Therefore, it plays an essential role in helping you grow and maintain bone tissue throughout life. Our bodies get vitamin D in two ways: through sun exposure and from certain foods.
How much you need depends on your age, according to the National Institutes of Health. For example, adults require less than people over 70, who produce less vitamin D through their skin. The National Institutes of Health recommend that most adults need international units IU each day to cover their basic needs for bone health. However, for overall health, it's best to get somewhere between IU to 4, IU per day.
Fish is a great way to cover your bases , while vegans and vegetarians can look to almond milk and mushrooms. Three ounces of fatty fish, like salmon, or a cup of portobello mushrooms will take care of your daily vitamin D needs.
Ross says that if you occasionally consume the maximum recommended amount — 4, IU — it won't hurt you. But if you are consistently reaching or exceeding this limit for months or years on-end, that's when it may lead to symptoms of toxicity. Ross says that the vitamin D your skin produces through sun exposure is hard to quantify but in general, it's supplements — not sunlight — that tips the scales towards toxicity.
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