It’s really easy to use, and it tastes quite nice, too – not too strong. Pump the spray once each day under your tongue or against the inside of your cheek, where the blood vessels are really close to the surface, and a plume of micro-droplets delivers a 25μg dose of vitamin D rapidly into your system. Deficiency in vitamin D is common, particularly among people who get limited sun exposure, as well as people with dark skin, people over age 65, and people who smoke. Breastfed infants and children with certain medical conditions are also susceptible to vitamin D deficiency. Most cases of vitamin D poisoning are diagnosed in cats that have the expected signs and a known or suspected exposure to Vitamin D-containing supplements, rat/mouse poisons or psoriasis treatments. Blood work showing elevated levels of calcium, phosphorous, or markers of kidney damage increase the suspicion for vitamin D poisoning. A urine sample may be performed to help assess kidney function. In some cases, specialized testing to rule out other causes of elevated calcium may be necessary. How is vitamin D poisoning treated? Vitamin D is necessary for the body to absorb calcium, a mineral that is essential for healthy bones, muscle movement, nervous system function, and immune system functions. Excessive amounts of vitamin D may result in poisoning. There are two forms of vitamin D. Plants, fungi and yeasts produce vitamin D2 (ergocalciferol), while vitamin D3 (cholecalciferol) is produced by animals.

Vitamin D and its metabolites are excreted in breast milk. Overdose in infants induced by nursing mothers has not been observed; however, when prescribing additional vitamin D to a breast-fed child the practitioner should consider the dose of any additional vitamin D given to the mother. Use of certain concomitant medications (e.g., anticonvulsant medications, glucocorticoids, anti-retrovirals)Vitamin D is well known and is a widely used material and has been used in clinical practice for many years. As such toxicity is only likely to occur in chronic overdose conditions where hypercalcaemia could result. Colecalciferol capsules should be prescribed with caution to patients suffering from sarcoidosis because of the risk of increased metabolism of vitamin D to its active form. These patients should be monitored with regard to the calcium content in serum and urine. Research shows that vitamin D3 is more effective than vitamin D2 at increasing blood levels of vitamin D. A 2020 study also found that both liquid and capsule vitamin D3 supplements can raise vitamin D levels efficiently. Which supplement is best for vitamin D deficiency? Prevention of vitamin D deficiency: 20,000 IU/month (1 capsule), higher doses may be required in certain situations, see below

Healthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. We avoid using tertiary references. You can learn more about how we ensure our content is accurate and current by reading our editorial policy.This study has several strengths. It is to our knowledge the first study where tablet and oil preparations of vitamin D 3 are compared in adult patients without cystic fibrosis. Another strength is that this is the first study where not only S-25-OHD concentration is measured, but also a clinically more relevant endpoint (antibiotic consumption). The observation that only oil drops caused a beneficial effect is somewhat unexpected, but nevertheless important. It could serve as a starting point for additional studies comparing tablets and oil preparations in relation to other outcomes (musculoskeletal, inflammatory, cardiovascular). Preferably, those studies should include measurements of serum markers of inflammation. I know this is a fairly short article compared to the other in-depth posts, so let me know if you’d like me to go in more detail anywhere. I can think of three possibilities. The most direct would be to use an injection of vitamin D. A recent research paper showed that an injection of 300,000 units of vitamin D led to much higher blood levels at three and six months. From supporting strong and healthy bones to maintaining your immune system, vitamin D is very important for a huge number of functions in the body. When the darker nights arrive, it becomes all the more important as we usually make our vitamin D using sunshine.