Yes, too much vitamin D can absolutely make you tired, along with causing other symptoms like confusion, nausea, muscle weakness, and increased thirst, primarily because it leads to dangerously high calcium levels in your blood (hypercalcemia). This fatigue is a sign of vitamin D toxicity, a rare condition usually resulting from excessive supplementation, not sun or food.
Too much vitamin D may include nausea, vomiting, weakness. A level up from the can can lead to hypercalcemia, causing elevated levels of calcium in the blood. This can result in kidney damage, bone pain, confusion, and, in severe cases, heart issues.
Too much vitamin D can cause dangerously high calcium levels in the blood, which can lead to symptoms like fatigue, nausea, confusion, and damage to blood vessels. Get your blood levels tested before adding a vitamin D supplement, and follow your healthcare provider's directions.
Certain vitamins, like B12 and vitamin D, when taken in excess, may lead to drowsiness or fatigue. Symptoms vary depending on the vitamin and individual sensitivity. It is important to follow recommended daily allowances and consult a healthcare provider before high-dose supplementation.
Preventing vitamin D toxicity
To help prevent vitamin D toxicity, don't take more than 4,000 international units (IU) a day of vitamin D unless your healthcare professional tells you to. Most adults need only 600 IU of vitamin D a day. Sometimes, healthcare professionals prescribe doses higher than 600 IU.
Summary. The effect of equivalent oral doses of vitamin D3 600 IU/day, 4200 IU/week and 18,000 IU/month on vitamin D status was compared in a randomized clinical trial in nursing home residents. A daily dose was more effective than a weekly dose, and a monthly dose was the least effective.
Higher 25(OH)D levels are associated with lower weight gains, suggesting low vitamin D status may predispose to fat accumulation.
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.
Melatonin Production Relies on Vitamin D: Vitamin D helps the body produce melatonin, a hormone that supports sleep.
Cholecalciferol (vitamin D3) may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
Fatigue is a feeling of constant exhaustion, burnout or lack of energy. It can be physical, mental or a combination of both. Fatigue can affect anyone – most adults experience it at some time in their life. Each year, many Australians see their doctor about fatigue.
Circadian rhythms , which regulate our body clock, may also influence the absorption and effectiveness of vitamin D3 . Some research suggests that taking your vitamin D3 supplement in the morning aligns it with your natural rhythm, which may promote better metabolic activation and energy management throughout the day.
Many people consider dietary supplements to be safe, but some may also cause fatigue. Two examples of supplements associated with fatigue are tryptophan and collagen. Collagen (derived from the Greek words kola [“gum”] and gen [“producing”]) is found throughout the human body.
The signs and symptoms of excessive vitamin D levels are related to hypercalcemia. Hypercalcemia symptoms involve an altered mental status (eg, with confusion, lethargy, anxiety, and depression). Constipation, anorexia, nausea, and musculoskeletal pain may also arise, as can cardiac arrhythmias.
Vitamin D3 (cholecalciferol) is generally better than Vitamin D2 (ergocalciferol) because it is more effective at raising and maintaining blood levels of vitamin D, is produced naturally by the body from sunlight, and is often recommended by doctors for deficiency correction. While both forms increase vitamin D in the blood, D3 is more potent and longer-lasting, making it the preferred choice for most people, though D2 is suitable for vegans.
Taking too much vitamin D leads to calcium buildup (hypercalcemia), causing physical signs like nausea/vomiting, fatigue/weakness, frequent urination & excessive thirst, constipation, and confusion/disorientation, alongside potential bone pain or kidney stones, often from supplements, not sun exposure.
Supplementing vitamin B6 may improve sleep quality and duration. A 2019 study also found that taking a supplement of magnesium, melatonin, and vitamin B complex for 3 months improved sleep and helped treat insomnia.
Vitamin B12 and folate perform several important functions in the body, including keeping the nervous system healthy. A deficiency in either of these vitamins can cause a wide range of problems, including: extreme tiredness. a lack of energy.
Between late March or early April to the end of September, most people can make all the vitamin D they need through sunlight on their skin and from a balanced diet. You may choose not to take a vitamin D supplement during these months.
Bile acid sequestrants, such as cholestyramine
These can also interact with vitamin D. One example of a bile acid sequestrant is cholestyramine (Prevalite). These medications bind to fat-soluble vitamins like vitamin D in the intestines. This may reduce the amount of vitamin D your body can absorb.
That means that if you take too much of it, you won't just pee it out like you would a water soluble vitamin. Instead of being carried out in your body's wastewater, the vitamin will cling to your body fat for later use—which can compound the effects of daily overdosing.
Calcium and vitamin D supplementation is associated with decreased abdominal visceral adipose tissue in overweight and obese adults.
Melatonin production: Vitamin D supports the creation of melatonin, the hormone that tells your body when it's time to sleep. Circadian rhythm: It helps regulate "clock genes" like Bmal1 and Per2, which influence your sleep-wake cycle.
Hair loss patients frequently have lower vitamin D concentrations. In studies, boosting vitamin D levels promoted hair thickness and growth. Optimising your vitamin D intake is key for maintaining healthy hair follicle cycling.
Medical conditions that can cause vitamin D deficiency include: Cystic fibrosis, Crohn's disease and celiac disease: These conditions can prevent your intestines from adequately absorbing enough vitamin D through supplements, especially if the condition is untreated.