Zorgwijzer: vitamine D (2023)

FAQs

How much vitamin D do I need a day? ›

The recommended daily amount of vitamin D is 400 international units (IU) for children up to age 12 months, 600 IU for people ages 1 to 70 years, and 800 IU for people over 70 years.

Levels of 50 nmol/L (20 ng/mL) or above are adequate for most people for bone and overall health. Levels below 30 nmol/L (12 ng/mL) are too low and might weaken your bones and affect your health. Levels above 125 nmol/L (50 ng/mL) are too high and might cause health problems.

Supplementation with 800 to 1000 IU/d of vitamin D or 50,000 IU monthly is safe for most people and can ensure levels of vitamin D within the optimal range.

Tests for Vitamin D Deficiency

A level of 20 nanograms/milliliter to 50 ng/mL is considered adequate for healthy people. A level less than 12 ng/mL indicates vitamin D deficiency.

We recommend taking it with a source of quality fat in the morning or when you break your fast. Avoid taking vitamin D in the evening (we'll talk about why below). Since vitamin D is a fat-soluble vitamin—meaning it doesn't dissolve in water—your body can most easily absorb it when you take it with food.

There are quite a few differences between vitamin D and vitamin D3, but the main difference between them is that vitamin D is a fat-soluble vitamin that regulates calcium and phosphorous levels in the body, whereas the vitamin D3 is the natural form of vitamin D produced by the body from sunlight.

Official answer. Generally, it takes a few weeks of taking daily vitamin D supplements for vitamin D levels in the body to rise. Each 1,000 IU of vitamin D3 taken daily is expected to raise blood levels of 25(OD)D by 10 ng/ml after a few weeks.

Growing evidence has demonstrated that vitamin D has a role in sleep regulation [12]. Specifically, vitamin D deficiency (VDD) can increase risk of sleep disorders and is associated with sleep difficulties, shorter sleep duration, and nocturnal awakenings in children and adults [13,14,15].

In summary, long-term supplementation with vitamin D3 in doses ranging from 5000 to 50,000 IUs/day appears to be safe.

What are symptoms of taking too much vitamin D? ›

The main consequence of vitamin D toxicity is a buildup of calcium in your blood (hypercalcemia), which can cause nausea and vomiting, weakness, and frequent urination. Vitamin D toxicity might progress to bone pain and kidney problems, such as the formation of calcium stones.

In general, the two main causes of vitamin D deficiency are: Not getting enough vitamin D in your diet and/or through sunlight. Your body isn't properly absorbing or using vitamin D.

Oranges are one of the fruits rich in Vitamin D as its juice is fortified with calcium & vitamin D. This is one of the best sources of vitamin D for people who are lactose intolerant and cannot include milk & dairy products in their diet.

Normal Results

The normal range of 25-hydroxy vitamin D is measured as nanograms per milliliter (ng/mL). Many experts recommend a level between 20 and 40 ng/mL. Others recommend a level between 30 and 50 ng/mL.

Therefore, conditions that affect the gut and digestion, like celiac disease, chronic pancreatitis, Crohn's disease, and cystic fibrosis, can reduce vitamin D absorption.

Try taking it alongside breakfast or with a bedtime snack — as long as it doesn't interfere with your sleep. The key is to find what works for you and stick with it to ensure you're meeting your vitamin D needs. Taking vitamin D with a meal can increase its absorption, but studies on specific timing are limited.

Vitamin D is vital for making our muscles work efficiently and boosting energy levels, new research from Newcastle University has shown.

As a fat-soluble vitamin, vitamin D is stored in your body fat and liver. Excess levels of vitamin D in your system can lead to an array of complications and symptoms, including weakness and fatigue.

A meta-analysis of randomized controlled trials that compared the effects of vitamin D2 and D3 supplements on blood levels found that D3 supplements tended to raise blood concentrations of the vitamin more and sustained those levels longer than D2. [76,77] Some experts cite vitamin D3 as the preferred form as it is ...

In our study, the microencapsulated form of vitamin D was the most bioavailable.

What form of vitamin D3 is best for absorption? ›

You want to choose a supplement that has vitamin D3, according to Bogden. “Vitamin D3 cholecalciferol is the most absorbable and potent form, [whereas] Vitamin D2 (ergocalciferol) is typically plant-based and not as effective at raising vitamin D levels in the body and thus is not recommended as often,” she explains.

Muscle weakness due to vitamin D deficiency is predominantly of the proximal muscle groups and is manifested by a feeling of heaviness in the legs, tiring easily, and difficulty in mounting stairs and rising from a chair; the deficiency is reversible with supplementation (15–18).

It is not necessary to take vitamin D every day. If you need to take vitamin D because your blood levels are low, you can take it every few days, weekly, or even monthly, because, as you mention, it is fat-soluble and, therefore, stored for future use within the fat in your body.

Conclusion: Vitamin D treatment significantly improved fatigue in otherwise healthy persons with vitamin D deficiency.

Is there a benefit to taking vitamin D at night? There's been some buzz suggesting a link between supplementing with vitamin D before bedtime and the ability to drift off to dreamland. Some studies have shown that vitamin D is connected to the production of melatonin, which regulates circadian rhythm and drives sleep.

If your blood levels are exceptionally low, you may need higher doses that should be used under the direction of a healthcare provider. In patients with vitamin D levels less than 20 ng/mL, start with 50,000 IUs of vitamin D3 once a week for 6 to 8 weeks.

Supplementing vitamin B6 may improve sleep quality and duration. A 2019 study also found that taking a supplement of magnesium, melatonin, and vitamin B complex for 3 months improved sleep and helped treat insomnia.

So, if you're taking your Vitamin D supplement at breakfast, lunch, or dinner, you can pair it with a food containing healthy fat. Try eating avocado, whole eggs, fatty fish, nuts, extra virgin olive oil, or full-fat dairy with your supplement to improve Vitamin D absorption.

Unless your doctor recommends it, avoid taking more than 4,000 IU per day, which is considered the safe upper limit. Choose food over pills.

The truth is, we do need vitamin D to stay healthy, but 5000 IU (units) of vitamin D in a daily tablet is more than most people need. The recommended maximum daily limit of vitamin D in healthy people is 4000 IU. That includes intakes from food, beverages, and supplements.

What are the benefits of vitamin D3 5000 IU? ›

Vitamin D3 5000 IU helps to prevent falls and fractures by maintaining muscle strength and improving balance. It also strengthens the immune system and protects against some chronic diseases, such as heart disease, cancer, and diabetes.

The fat-soluble vitamins A and D are the most likely to cause toxicity symptoms if you consume them in high amounts.

Oral vitamin D ₃ has no significant effect on blood pressure in people with vitamin D deficiency. It reduces systolic blood pressure in people with vitamin D deficiency that was older than 50 years old or obese.

Hypercalcemia caused by excess vitamin D can also lead to kidney problems or even kidney damage. Because having too much vitamin D increases the absorption of calcium, it can result in the formation of kidney stones. However, evidence also suggests that more serious, long-term kidney damage can also take place.

With a serve of two eggs providing 82% of your daily recommended intake of vitamin D, eggs contain one of the highest quantities of vitamin D of any food.

Nope, no vitamin D here. But bananas do contain plenty of magnesium. And guess what? Among the many reasons you need magnesium is that once your vitamin D is in your bloodstream, the magnesium puts it to work, making magnesium a must-have in order for you to access the many benefits of vitamin D.

Mushrooms

Except vitamin D fruit juices and milk, mushrooms are the only plant-based foods that are a good source of vitamin D. Just like humans, mushrooms too synthesize this vitamin when exposed to sunlight.

The safe upper limit of intake is set at 4,000 IU per day. Intake in the range of 40,000–100,000 IU per day (10–25 times the recommended upper limit) has been linked with toxicity in humans.

The RDA of vitamin D for all people aged 1–70 is 600 IU . For children below the age of 1, it is 400 IU, and for adults over 70, it is 800 IU.

A Fred Hutchinson Cancer Research Center study involving postmenopausal, overweight, and obese women who took 2,000 IUs of vitamin D daily for a year found that those whose vitamin D blood levels increased the most had the greatest reductions in blood estrogens, which are a known risk factor for breast cancer.

How long does it take to recover from vitamin D deficiency? ›

How Much Vitamin D Do I Need Per Day? Besides going outdoors in the sunshine, there are two others ways to improve the amount of vitamin D in your system: eating foods rich in vitamin D and supplements. “Adding an over-the-counter vitamin D supplement can make improvements in just three to four months time.

Research also demonstrated that the higher the level of caffeine, the more it interfered with vitamin D absorption. The study suggested that caffeine did this by reducing the expression of vitamin D receptors on osteoblasts in the body – the cells responsible for producing bone.

Vitamin D recommended intake is at 400–800 IU/day or 10–20 micrograms. However, some studies suggest that a higher daily intake of 1,000–4,000 IU (25–100 micrograms) is needed to maintain optimal blood levels.

Vitamin D toxicity can have devastating health effects, which may not show up until months or even years after starting to take high doses. Generally, it's not recommended to exceed the upper limit of safe intake, which is 4,000 IU (100 mcg) per day.

Vitamin D is important for your bones, muscles, nerves, immune system, and more. But if you get too much, it could lead to a rare and possibly serious condition called vitamin D toxicity. You may hear your doctor call it hypervitaminosis D. The condition can bring symptoms like weakness and vomiting.

Most people should take vitamin D3 5000 IU daily. However, there are some exceptions. People who should not take vitamin D3 5000 IU include those who are allergic to vitamin D, pregnant women and children under the age of 12. Speak with a healthcare professional to see if vitamin D3 is right for you.

Try taking it alongside breakfast or with a bedtime snack — as long as it doesn't interfere with your sleep. The key is to find what works for you and stick with it to ensure you're meeting your vitamin D needs. Taking vitamin D with a meal can increase its absorption, but studies on specific timing are limited.

However, some sources say you should consume up to 1000 IU of vitamin D past the age of 70. If you are older than 65, you should get a blood test and speak with your doctor to tailor a treatment plan to your body.

Neither normal nor excessively high intakes of vitamin D are associated with liver injury or liver test abnormalities.

Can vitamin D affect your bowel movements? ›

Too much or too little of necessary nutrients, such as vitamin D, can cause significant health problems. That being said, when you intake excess or toxic levels of vitamin D, you may experience constipation, in addition to other digestive problems, loss of appetite, and muscle weakness.

The current daily recommended amount of vitamin D is 600 IU per day for adults under the age of 70, and 800 IU for older adults. Up to 4,000 IU per day is generally considered the safe upper limit, however, doses up to 10,000 IU/day have not been shown to cause toxicity.