Our only hard recommendation: Avoid supplementing with vitamin D at night. There's evidence that vitamin D can suppress melatonin—which is bad news for your sleep quality.
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.
However, higher levels of blood vitamin D appear to improve sleep quality 5. But what's important to note is that while low blood levels of vitamin D may impede sleep quality, one study did find that high blood levels may also interfere with sleep.
While the best timing has not been established, scientific data to confirm anecdotal reports that supplementing at night may interfere with sleep is unavailable. Current research suggests you can fit vitamin D into your routine whenever you prefer.
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.
An intervention study reported that vitamin D supplementation (D3) in veterans (50,000 IU/week) increased their sleep duration [56]. Another double-blind clinical trial showed use of vitamin D supplementation (50,000 IU/fortnight for 8 weeks) facilitated sleep duration and quality in people with sleep disorder [61].
Excessive amounts of vitamin D in the body can cause calcium levels in the blood to rise. This can lead to a condition called hypercalcemia (too much calcium in your blood). Symptoms include: fatigue.
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.
As a fat-soluble vitamin, vitamin D is stored in your body fat and liver. Excess levels of vitamin D in your system can lead to an array of complications and symptoms, including weakness and fatigue.
Vitamin D does not directly give you energy however studies have shown that vitamin D can increase energy levels from within the cells of your body and that excessive fatigue and tiredness may be caused as a result of a vitamin D deficiency.
Vitamin D is vital for physical and mental health. A vitamin D deficiency can impact your mood, meaning it may contribute to feeling down or depressed. Research suggests there's a relationship between vitamin D and depression, but there isn't enough evidence to support saying low vitamin D levels cause depression.
Extra amounts of water-soluble vitamins are typically excreted. The fat-soluble vitamins A and D are the most likely to cause toxicity symptoms if you consume them in high amounts.
There are quite a few differences between vitamin D and vitamin D3, but the main difference between them is that vitamin D is a fat-soluble vitamin that regulates calcium and phosphorous levels in the body, whereas the vitamin D3 is the natural form of vitamin D produced by the body from sunlight.
Several studies have shown a direct relationship between the excessive dosage of vitamin D supplements and anxiety. In addition, individuals suffering from psychological illnesses have experienced problematic behaviour to hide the pain symptoms.
How Long Does It Take for Vitamin D to Work? If you have a vitamin D deficiency, you may notice improvements within 4-6 weeks of consistent supplementation. However, that timeframe can vary depending on what your baseline vitamin D levels are.
Vitamin B12 deficiency: a rare cause of excessive daytime sleepiness.
Official answer. Generally, it takes a few weeks of taking daily vitamin D supplements for vitamin D levels in the body to rise. Each 1,000 IU of vitamin D3 taken daily is expected to raise blood levels of 25(OD)D by 10 ng/ml after a few weeks.
The best time of day to take vitamin D supplements is in the morning. It is also a good idea to take it around your breakfast time to best absorb it. Since Vitamin D is a fat-soluble vitamin, it is best absorbed when taken with a meal.
To get an optimal vitamin D supplement from the sun at a minimal risk of getting cutaneous malignant melanoma (CMM), the best time of sun exposure is noon.
The best time to soak yourself in the sun to get the maximum vitamin D is between 10 am to 3 pm. At this time, the UVB rays are intense and it is also said that the body is more efficient in making vitamin D at this time.