Yes, getting too much vitamin D can be harmful. Very high levels of vitamin D in your blood (greater than 375 nmol/L or 150 ng/mL) can cause nausea, vomiting, muscle weakness, confusion, pain, loss of appetite, dehydration, excessive urination and thirst, and kidney stones.
What happens if I take too much vitamin D? Taking too many vitamin D supplements over a long period of time can cause too much calcium to build up in the body (hypercalcaemia). This can weaken the bones and damage the kidneys and the heart.
Unless your doctor recommends it, avoid taking more than 4,000 IU per day, which is considered the safe upper limit.
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.
Because vitamin D toxicity can cause side effects like rapid heartbeat, confusion, restlessness and chest pains, it can potentially cause feelings associated with anxiety.
While vitamin D itself is unlikely to be causing your anxiety, that doesn't mean it can't, and the activities that you do to help increase vitamin D are valuable for your anxiety anyway.
Vitamin D is non-drowsy, but it won't keep you awake, either. However, one study has suggested that taking an adequate amount of vitamin D can help you sleep better at night.
If you take too much supplemental or prescription vitamin D, it can lead to vitamin D toxicity. The main complication of this is moderate to severe hypercalcemia, which can cause symptoms like vomiting, increased thirst and frequent urination.
“Adding an over-the-counter vitamin D supplement can make improvements in just three to four months time.
There's no set time of day that's best to take vitamin D supplements. Some people say taking vitamin D supplements at night is an insomnia risk. There's no research to confirm this, but you might want to take your supplement earlier in the day if you think it's screwing with your sleep.
While it is possible to take enough vitamin D once a week to keep yourself balanced, the best results were found to be a lower dose (1,000-2,000 IUs or 25-50 mcg ) taken daily. Taking vitamin D consistently with a meal containing healthy fats will ensure that your body absorbs it properly.
Vitamin D can indeed cause hair loss, but it's rare. Although the precise role of vitamin D in hair growth isn't well understood, research shows that vitamin D receptors play an important role in the anagen phase of the hair follicle cycle — the phase in which new hairs grow from the follicle to their full length.
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.
chest pain, feeling short of breath; growth problems (in a child taking cholecalciferol); or. early signs of vitamin D overdose--weakness, metallic taste in your mouth, weight loss, muscle or bone pain, constipation, nausea, and vomiting.
Excess Vitamin D
You may also develop kidney stones or kidney damage. Other symptoms of vitamin D toxicity include weakness, fatigue or tiredness, vomiting, weight loss, itchy skin, constipation and muscle control issues.
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.
Caution is advised if you have diabetes, liver disease, phenylketonuria (PKU), or any other condition that requires you to limit/avoid these substances in your diet. Ask your doctor or pharmacist about using this product safely.
"Adequate levels of magnesium in the body are essential for the absorption and metabolism not only of vitamin D but of calcium as well," Dean states. "Magnesium converts vitamin D into its active form so that it can help calcium absorption.
Safety and side effects
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.
The administration of doses higher than 100,000 IU of vitamin D is considered a megadose.