Does vitamin D affect blood pressure?
Emily Sparks
Published Jan 25, 2026
The results of this meta-analysis indicate that supplementation with vitamin D does not lower blood pressure in the general population. On the basis of this finding, we do not recommend using vitamin D supplementation to prevent hypertension.
Can too much vitamin D raise your blood pressure?
Too much vitamin D can cause abnormally high levels of calcium in the blood. This can affect bones, tissues, and other organs. It can lead to high blood pressure, bone loss, and kidney damage if not treated.
Can you take vitamin D if you have blood pressure?
“Vitamin D enables the uptake of calcium,” he says. “In theory, too-high levels potentially can result in calcium deposits ending up on blood vessel walls, in heart valves and even in the liver and kidneys. So our advice is not to start vitamin D as a means to lower blood pressure.”
When should you not take vitamin D?
However, taking too much vitamin D in the form of supplements can be harmful. Children age 9 years and older, adults, and pregnant and breastfeeding women who take more than 4,000 IU a day of vitamin D might experience: Nausea and vomiting. Poor appetite and weight loss.
Are there any vitamins that lower blood pressure?
Foods high in vitamin C, vitamin E, potassium, selenium or L-arginine are good options if you're looking to lower your blood pressure. Antioxidants protect your cells from damage and can reduce inflammation, which, in turn, can keep blood pressure in control.
36 related questions foundWhat are the signs of 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.
How much vitamin D should I take for high blood pressure?
In addition, a meta-analysis synthesizing the results of 30 RCTs suggested that vitamin D supplementation at a dose of >800 IU/d reduced blood pressures significantly (14).
What are side effects of vitamin D?
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.
Is it OK to take vitamin D everyday?
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.
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.
Is it better to take vitamin D daily or weekly?
Conclusion. Daily vitamin D was more effective than weekly, and monthly administration was the least effective.
What can cause a sudden rise in blood pressure?
Causes of Blood Pressure Spikes
- Caffeine. Even if you have normal blood pressure readings, caffeine consumption can cause a temporary but dramatic blood pressure spike. ...
- Certain Medications. ...
- Consumption of Foods Containing Tyramine. ...
- Smoking. ...
- Stress. ...
- Anxiety. ...
- Overactive Adrenal Gland. ...
- Drug Use.
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.
Do you pee out excess vitamin D?
But vitamin D, unlike many of the other vitamins you may be taking, is fat soluble. That means that if you take too much of it, you won't just pee it out like you would a water soluble vitamin.
What's the difference between vitamin D and vitamin D3?
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.
Can I take 5000 IU of vitamin D3 daily?
In summary, long-term supplementation with vitamin D3 in doses ranging from 5000 to 50,000 IUs/day appears to be safe.
Do vitamin D3 have side effects?
Too much vitamin D can cause harmful high calcium levels. Tell your doctor right away if any of these signs of high vitamin D/calcium levels occur: nausea/vomiting, constipation, loss of appetite, increased thirst, increased urination, mental/mood changes, unusual tiredness.
Does D3 make you gain weight?
Despite these findings, the current body of research suggests that consuming higher amounts of vitamin D has little effect on weight gain or loss.
How much vitamin D3 is too much?
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.
Does drinking a lot of water increase blood pressure?
Water drinking also acutely raises blood pressure in older normal subjects. The pressor effect of oral water is an important yet unrecognized confounding factor in clinical studies of pressor agents and antihypertensive medications.
How can you bring your blood pressure down quickly?
What's the Fastest Way to Lower My Blood Pressure Safely?
- There's no quick and safe way to lower blood pressure outside of a medical setting.
- Lifestyle changes that incorporate exercise, diet, and stress-reducing techniques can naturally lower blood pressure over time.
How much water should you drink if you have high blood pressure?
Making lifestyle changes is an essential first step in treating high blood pressure. To get the maximum health benefits of drinking water, you need to drink eight to ten 8-ounce glasses of water per day. Chronic dehydration also can be a cause of high blood pressure by making the body hold onto sodium.
Is 25 mcg of vitamin D enough?
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. However, don't consume more than 4,000 IU of vitamin D without your doctor's permission.
Is 50000 IU vitamin D too much?
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.
How much vitamin D should a woman have?
A: The upper tolerable limit is 4,000 international units (IU) daily, and the recommended amount for women 14 to 70 is 600 IU per day. Women 71 and older should aim for 800 IU per day.