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Should vitamin D tablets be taken all year round?

Author

Emily Sparks

Published Jan 09, 2026

Any one at risk of not getting enough vitamin D should take a vitamin D supplement – especially during the winter months but ideally all year round.

How long should vitamin D supplements be taken?

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. After that, a dose of 800 to 2000 IU per day should be taken to maintain vitamin D levels above 30 ng/mL.

Can you take vitamin D supplements long term?

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.

Should you take vitamin D everyday?

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.

Can you stop taking vitamin D in the summer?

If your vitamin D levels were in a good range before the summer (above 40) and you're outside most days during peak hours, you can probably take time off from the use of supplements.

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What happens to your body when you stop taking vitamin D?

Feeling weak, tired, hungry and foggy from vitamin withdrawal can cause you to want to avoid social activities, stop exercising or even develop sleep problems.

Is it better to take vitamin D every day or once a week?

Conclusion. Daily vitamin D was more effective than weekly, and monthly administration was the least effective.

How do you know if you have 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.

Can to much vitamin D hurt you?

Too much vitamin D can cause an abnormally high blood calcium level, which could result in nausea, constipation, confusion, abnormal heart rhythm, and even kidney stones. It's nearly impossible to get too much vitamin D from sunlight or from foods (unless you take way too much cod liver oil).

How do you know if you're low in vitamin D?

Symptoms of vitamin D deficiency can include muscle weakness, pain, fatigue and depression. To get enough D, look to certain foods, supplements, and carefully planned sunlight.

Can vitamin D cause high blood pressure?

Vitamin D deficiency may be linked to heart disease and an increased risk of high blood pressure (hypertension).

How can I check my vitamin D levels at home?

At-home tests typically have you prick and squeeze a finger to collect a smaller blood sample. It's easier to measure 25-OH D because it lasts longer in the bloodstream, around 14 days, and it's also easier to detect changes in 25-OH D levels that are associated with vitamin D deficiency.

How long does it take to get your vitamin D levels up?

“Adding an over-the-counter vitamin D supplement can make improvements in just three to four months' time. Vitamin D with a strength of 1000-2000 international units daily is the recommended dose for most adults,” Dr. Ropte says. Most multivitamins contain vitamin D, so extra supplementation isn't always necessary.

Which fruit is high in vitamin D?

Which fruit is rich in vitamin D? Fortify orange juice is the best fruit option for vitamin D and other nutrients like calcium.

Who should not take vitamin D3?

Who should not take VITAMIN D3?

  • sarcoidosis.
  • high amount of phosphate in the blood.
  • high amount of calcium in the blood.
  • excessive amount of vitamin D in the body.
  • kidney stones.
  • decreased kidney function.

When should I take vitamin D morning or night?

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.

Can vitamin D cause kidney stones?

Increased vitamin D levels may prevent a wide range of diseases, according to recent studies. However, some previous studies led to a concern that vitamin D supplementation could increase an individual's risk of developing kidney stones.

Can I take 60000 IU of vitamin D daily?

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.

Can I take 5000 IU of vitamin D3 everyday?

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

Can too much vitamin D cause inflammation?

Risks: When Too Much Vitamin D Is Too Much

Vitamin D supplements reduce blood levels of C-reactive protein, or CRP, an indicator of inflammation that is linked to cardiovascular disease.

How often should you take vitamin D tablets?

Some may be taken daily, once a week, or once a month. When treating low vitamin D levels, a doctor will do a blood test every few months to see if a person's levels are increasing. The Endocrine Society recommend that adults between the ages of 19 and 55 receive 600 IU of vitamin D daily.

Does vitamin D build up in your body?

Like the other fat-soluble vitamins, vitamin D is stored in the body's adipose (fat) tissue. That means your body can mobilize its own reserves if your daily intake falters temporarily — but it also means that excessive doses of vitamin D can build up to toxic levels.

Is 1000mg of vitamin D enough?

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.

Does vitamin D lower cholesterol?

The improvements in total cholesterol and triglycerides were more pronounced in participants with baseline vitamin D deficiency. Conclusions: Vitamin D supplementation appeared to have a beneficial effect on reducing serum total cholesterol, LDL cholesterol, and triglyceride levels but not HDL cholesterol levels.

Can I take vitamin D with high blood pressure medication?

In other words, patients taking vitamin D supplements had similar changes in blood pressure as those taking an inactive placebo drug. Based on these findings, authors conclude that vitamin D supplements should not be used as treatment for high blood pressure.