How much vitamin D should adults take? how much vitamin d3 per day for a woman.
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Adults aged up to 70 years old should be getting at least 600 IU. Adults older than 70 should be getting at least 800 IU of vitamin D.
Her bottom line advice: In general, older people can achieve healthy levels of vitamin D by taking the recommended 800 IU of vitamin D a day and they don’t need to be tested.
Osteoporosis is more common in women, but as men reach about 50 years of age, their risk may also begin to increase. Getting additional calcium and vitamin D can help protect their bones from osteoporosis. After the age of 70 years, men should aim to get 1,200 mg of calcium and 800 IU of vitamin D per day.
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.
The Endocrine Society Practice Guidelines recommend that up to 10,000 IUs daily was safe for adults. This is in contrast to the recommended UL at 4,000 IU/d from the IOM.
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.
In summary, long-term supplementation with vitamin D3 in doses ranging from 5000 to 50,000 IUs/day appears to be safe.
Current guidelines say adults shouldn’t take more than the equivalent of 100 micrograms a day. But vitamin D is a ‘fat-soluble’ vitamin, so your body can store it for months and you don’t need it every day. That means you could equally safely take a supplement of 20 micrograms a day or 500 micrograms once a month.
Taking a multivitamin with vitamin D may help improve bone health. 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.
25OHD blood levels were 31.4, 102, 164, 148, and 143ng/ml. No one developed hypercalcemia or any adverse events. The major finding of this case series is prolonged daily dosing of vitamin D3 with doses of 10,000 to 60,000 IU was safely tolerated.
Scientists found that taking 1,000 IU (25 mcg) of vitamin D daily reduced heart disease risk by 10% ( 16 ). Based on current research, it seems that consuming 1,000–4,000 IU (25–100 mcg) of vitamin D daily should be ideal for most people to reach healthy vitamin D blood levels.
Conclusions: Vitamin D3 therapy (50,000-100,000 IU/week) was safe and effective when given for 12 months to reverse statin intolerance in patients with vitamin D deficiency. Serum vitamin D rarely exceeded 100 ng/mL, never reached toxic levels, and there were no significant change in serum calcium or eGFR.
There are two possible forms of vitamin D in the human body: vitamin D2 and vitamin D3. Both D2 and D3 are simply called “vitamin D,” so there’s no meaningful difference between vitamin D3 and just vitamin D.
Studies have shown that vitamin D3 supplements may be superior in raising the body’s vitamin D stores. There are many health benefits to vitamin D supplementation, but your doctor should use lab tests to recommend the amount of vitamin D you should take and which form.
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 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.
Daily vitamin D was more effective than weekly, and monthly administration was the least effective.
In addition to supporting bone health, vitamin D plays an important role maintaining cardiovascular health and immune function, and promoting an overall sense of well-being.
In terms of upper limits, there has never been a case of toxicity at levels below 200 ng/mL. It takes about 100 IU per day for every rise in blood levels of about 1 ng/mL, so to get all the way up to 200 ng/mL it would take 20,000 IU per day at a minimum, and probably more.
2000 IU is equivalent to 50 micrograms not mg. … The value is expressed in IU (International Unit). For each substance it has a different mass equivalent.
Nearly all vitamin D overdoses come from supplements. The Institute of Medicine’s Food and Nutrition Board’s old 1997 recommendations suggested that 2,000 IU per day of vitamin D is safe for adults and that 1,000 IU per day is safe for infants up to 12 months of age.
1,000 IU is not the same as 1,000 mg. As of now, no vitamin or mineral has a conversion factor that is equal to one.
- Fatigue.
- Bone pain.
- Muscle weakness, muscle aches, or muscle cramps.
- Mood changes, like depression.
“Both vitamin D deficiency, as well as vitamin D excess, may cause hair loss,” Chacon explains. A 2020 study in the International Journal of Dermatology found that vitamin D deficiency may also play a role in the development and severity of androgenetic alopecia, also known as male pattern baldness.
So the vitamin D that your skin absorbs from the sun is the D3 form. Dr. Levitan says that people who need vitamin D supplements should take D3. This is the most active form of vitamin D in your body, as the liver converts D2 to D3.
In the winter, in addition to high vitamin D food, adults should take additional vitamin D from foods and/or supplements to get at least 600 IU per day of vitamin D. People who have dark skin or avoid sunshine should eat more vitamin D year-round.