Most studies show that vitamin D3 is more effective than vitamin D2 at raising blood levels of calcifediol 7 , 8. For example, one study in 32 older women found that a single dose of vitamin D3 was nearly twice as effective as vitamin D2 at raising calcifediol levels 9.
Summary Vitamin D3 appears to be better than D2 at improving vitamin D status. Scientists have raised concerns that vitamin D2 supplements might be lower quality than D3 supplements. In fact, studies suggest vitamin D2 is more sensitive to humidity and fluctuations in temperature. For this reason, vitamin D2 supplements may be more likely to degrade over time However, whether this is relevant to human health is unknown.
Also, no studies have compared the stability of vitamin D2 and D3 dissolved in oil. Simply make sure to store your supplements in a closed container, at room temperature, in a dry place and out of direct sunlight. Summary Vitamin D2 supplements may be more likely to degrade during storage. More studies are needed to examine the relevance of this to human health. If you take vitamin D supplements, make sure not to exceed the safe upper intake level, which is 4, IU micrograms per day for adults According to the US Institute of Medicine, the recommended daily allowance is — IU 10—20 micrograms , but common supplemental doses range from 1,—2, IU 25—50 micrograms per day.
For detailed information on the optimal dosage of vitamin D, read this article. Summary You can increase your vitamin D levels by regularly eating foods rich in vitamin D and spending time in the sun.
Vitamin D is not a single compound but a family of related nutrients. The most common dietary forms are vitamins D2 and D3. The D3 form is found in fatty animal-sourced foods, such as fish oil and egg yolk.
Your skin also produces it in response to sunlight or ultraviolet light. In contrast, vitamin D2 comes from plants. Interestingly, vitamin D3 appears to be more effective at increasing levels of vitamin D in the blood.
Although, scientists debate the relevance of this to human health. To maintain adequate vitamin D levels, make sure to regularly eat plenty of foods rich in vitamin D or spend some time in the sun.
If you take supplements, vitamin D3 is probably your best choice. This is a detailed article about vitamin D and its health effects. Vitamin D actually functions as a hormone, and deficiency is incredibly common.
Here are eight symptoms that may indicate you have a vitamin D deficiency, as well as causes, treatments, and more. Ask a doctor or pharmacist before taking any multivitamins, mineral supplements, or antacids while you are taking ergocalciferol. Use Vitamin D2 Ergocalciferol Vitamin D2 exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended. Follow all directions on your prescription label and read all medication guides or instruction sheets.
Use only the recommended dose of ergocalciferol. It may be best to take ergocalciferol after a meal, but you may take this medicine with or without food. Measure liquid medicine carefully. Use the dosing syringe provided, or use a medicine dose-measuring device not a kitchen spoon.
Your doctor may begin to reduce your ergocalciferol dose as your condition improves. Carefully follow all instructions about adjusting your dose. In some cases, there may be a very small difference in amount between safe and dangerous doses of this medicine. Ergocalciferol may be only part of a complete program of treatment that also includes dietary changes and taking calcium and vitamin supplements. Follow your doctor's instructions very closely.
Learn about the foods you should eat to make sure you get enough calcium and vitamin D in your diet. Your ergocalciferol dose may need to be adjusted as you make changes to your diet. Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time. Overdose symptoms may include nausea, loss of appetite, thirst, urinating more or less than usual, body aches, stiffness, confusion, or irregular heartbeats.
Taking a vitamin D supplement can improve deficiencies within months of using it. But these effects could take longer if you have a more serious deficiency. Older individuals and dark-skinned people tend to produce less vitamin D in the skin 34 , Also, geographic location and season are relatively crucial because vitamin D production is affected in places further away from the equator 35 , The Skin Cancer Organization recommends that you only do this two to three times weekly, followed by sunscreen use.
Keep in mind that the same process that helps your body synthesize vitamin D can cause DNA damage, sunburn, genetic mutations. This can cause wrinkles to develop and increase your risk for skin cancer During the winter, and for those living far from the equator, supplements may be needed. While incidences of vitamin D toxicity are rare, getting too much can be harmful. It could lead to:. This is typically only seen in individuals who have accidentally or intentionally taken extremely high vitamin D doses for long periods 22 , 38 , Vitamin D is essential for bone health and many other aspects of health.
Deficiency is prevalent and may have health consequences for many people. Here are eight symptoms that may indicate you have a vitamin D deficiency, as well as causes, treatments, and more. 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…. This is a detailed review of vitamin D toxicity and how much vitamin D is considered too much. Toxicity is rare, but can occur with extremely high….
This article lets you know what dosage of vitamin D is best. Vitamins D and K are crucial for your health, but some say vitamin D is harmful to those low in vitamin K. Here's a look at the science behind this…. Vitamin D is an important nutrient that may also have benefits for weight loss. This article explores the relationship between vitamin D and body…. Vitamin D is essential for health, but it can be hard to get enough of it from your diet. Here are 7 healthy foods that are high in vitamin D.
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