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.
Taking 5000 IU of vitamin D3 daily is generally considered safe for most people, especially those with low blood levels of vitamin D. The upper limit for adults is typically around 4000 IU per day, but higher doses may be prescribed for specific deficiencies under medical supervision.
Yes, it is generally safe to take 1000 IU of vitamin D3 daily. This dosage falls within the recommended range for maintaining healthy levels of vitamin D, especially for individuals who may not get enough sun exposure or have specific dietary needs.
Yes, 2000 IU (International Units) of vitamin D is generally considered safe for most adults. The tolerable upper intake level (UL) for vitamin D established by health organizations, including the Institute of Medicine, is 4000 IU per day for adults.
Results: Supplementing with 1,000 IU/day raised vitamin D levels to the recommended range (above 75 nmol/l), but levels dropped below this range after a 30-day break. A dose of 2,000 IU/day maintained vitamin D levels within the recommended range, even after the break.
If you've been getting bone, muscle or joint pain, your symptoms are likely to get better when your vitamin D levels are normal again. This is usually after a few weeks or months.
Health effects of vitamin D toxicity
The main concern of vitamin D toxicity is a buildup of calcium in the blood. This is called hypercalcemia. Hypercalcemia can cause upset stomach and vomiting, weakness, and frequent urination. It also can lead to bone pain and kidney troubles such as kidney stones.
Some people may need a higher dose, however, including those with a bone health disorder and those with a condition that interferes with the absorption of vitamin D or calcium, says Dr. Manson. Unless your doctor recommends it, avoid taking more than 4,000 IU per day, which is considered the safe upper limit.
Vitamin D 5000 IU is a high-dose supplement that can help treat vitamin D deficiency, which occurs when people don't get enough vitamin D through the sun or their diet.
The effect of equivalent oral doses of vitamin D3 600 IU/day, 4200 IU/week and 18,000 IU/month on vitamin D status was compared in a randomized clinical trial in nursing home residents. A daily dose was more effective than a weekly dose, and a monthly dose was the least effective.
“Biotin is essential for hair and nail growth; biotin deficiency, in fact, can lead to hair loss and brittle nails,” says Carmen Castilla, MD, a board-certified dermatologist based in New York City.
If you choose to take vitamin D supplements, 10 micrograms a day will be enough for most people. Do not take more than 100 micrograms (4,000 IU) of vitamin D a day as it could be harmful. This applies to adults, including pregnant and breastfeeding women and the elderly, and children aged 11 to 17 years.
As described previously, the products of vitamin D metabolism are excreted through the bile into the feces, and very little is eliminated through the urine. This is in part due to renal reuptake of vitamin D metabolites bound to DBP, as mediated by the cubilin–megalin receptor system (Willnow and Nykjaer, 2005).
There is evidence that vitamin A, vitamin B complex, vitamin C, vitamin D, vitamin E, biotin, and the minerals chromium, iron, selenium, and zinc play important roles in maintaining skin heath. Additional supplementation may be helpful for specific skin conditions.
Mayo Clinic recommends that adults get at least the RDA of 600 IU. However, 1,000 to 2,000 IU per day of vitamin D from a supplement is generally safe, should help people achieve an adequate blood level of vitamin D, and may have additional health benefits.
Some side effects of taking too much vitamin D include weakness, dry mouth, nausea, vomiting, and others. Taking vitamin D for long periods of time in doses higher than 4000 IU (100 mcg) daily is possibly unsafe and may cause very high levels of calcium in the blood.
Before your body can use vitamin D, your liver must change it into another form called 25 hydroxyvitamin D, or 25(OH)D. Most vitamin D blood tests measure the level of 25(OH)D in your blood because that's the most accurate way to see if you have enough vitamin D.
But how do you flush vitamin D out of your system – and can you even do that? Yes, by ensuring you consume plenty of water. This will encourage urination, allowing your body to shed the excess vitamin D and calcium more quickly. Prescription diuretics like furosemide can also be helpful.
Some people take a vitamin D supplement every day, and other people only take it once per week. Either way, the time of day you take your vitamin D supplement doesn't matter. But research does show that vitamin D gets absorbed a bit better if you take it with fatty foods.
In cases of vitamin D toxicity, serum levels of 25(OH)D concentration often exceed 150 ng/mL (375 nmol/L), accompanied by normal or elevated values of 1,25(OH)2D concentration. [4] Patients with coexisting granulomatous diseases may present with decreased or normal 25(OH)D concentration and elevated 1,25(OH)2D levels.