Vitamin D deficiency

This study investigates whether giving vitamin D supplements to adults with inflammatory bowel disease (Crohn's disease or ulcerative colitis) who also have low vitamin D levels can improve their iron status. Participants take high-dose vitamin D3 weekly for 8 weeks, then a lower…

This study tested a simple scoring system called RISQ to help healthcare workers quickly identify which severely malnourished children are most at risk of dying. Over 14,600 children aged 6 to 59 months in Chad took part. The goal was to see if using the RISQ system could lower d…

This study tested whether adding photodynamic therapy (a light-based treatment) and vitamin D to standard deep cleaning helps people with moderate gum disease. Twenty-four adults with stage II grade B periodontitis took part. The goal was to see if the combination improves gum at…

This study tested whether taking omega-3 or vitamin D supplements daily helps treat gum disease (periodontitis) better than standard deep cleaning alone. 72 adults with moderate gum disease received either omega-3, vitamin D, or no supplement alongside their dental treatment. Res…

This study looked at whether giving vitamin D supplements to people with low vitamin D levels and newly diagnosed non-Hodgkin lymphoma or chronic lymphocytic leukemia could improve their outcomes. About 197 participants received either a low or high dose of vitamin D while underg…

This study tested whether special cookies made from soy, chickpea, and peanut flour could improve the health of malnourished children. Sixty children aged 3 to 10 years were split into two groups: one group ate the cookies daily for three months along with their regular diet, whi…

This study looked at 90 children aged 6 to 12 with night-time bedwetting and low vitamin D levels. It compared three treatments: vitamin D alone, desmopressin alone, or both together. The goal was to see which approach reduced wet nights the most over 3 to 6 months.

This study looked at whether giving vitamin D supplements to adults with type 2 diabetes who also have low vitamin D levels can improve their blood sugar control. 119 participants took a high dose of vitamin D once a month for three months. Researchers measured blood sugar and ot…

This study tested whether taking vitamin D every day could reduce lung complications in children and teens with sickle cell disease. Lung problems like infections, asthma attacks, and acute chest syndrome are major causes of illness and death in this condition. Researchers gave d…

This study tested whether eating vitamin D fortified bread can prevent low vitamin D levels in Irish families during winter. 128 people from different households took part. Researchers compared vitamin D levels between those who ate the fortified bread and those who ate regular b…

This study looked at whether taking omega-3 supplements (like fish oil) could help with anxiety, depression, and vitamin D levels in college students aged 18-27. Over 100 students took either a placebo, a low dose, or a high dose of omega-3s daily for 90 days. Researchers measure…

This study looked at whether a higher daily dose of vitamin D (4000 IU) is better than the standard dose (400 IU) for adults who had a major burn injury and are vitamin D deficient. 48 people took part, and researchers measured changes in their physical and mental health, as well…

This study tested whether taking a high dose of vitamin D3 daily for 12 weeks could improve muscle strength and mass in older adults with obesity. Researchers enrolled 29 participants aged 60 and older in southern Mexico. They measured handgrip strength, muscle mass, and physical…

This pilot study investigates how common low energy availability, iron deficiency, and low vitamin D levels are among Black collegiate athletes. Participants who are found to have low iron or vitamin D will receive daily supplements for 12 weeks. The goal is to better understand …

This study looked at whether vitamin D levels in the blood affect the chance of a successful pregnancy after in vitro fertilization (IVF). Researchers followed 688 women aged 21-40 undergoing their first IVF cycle. The goal was to see if women with higher vitamin D levels had hig…

This study looked at whether vitamin D levels affect how well broken bones heal in young adults aged 18 to 25. Researchers measured vitamin D at the time of injury and tracked healing for up to a year. The goal was to understand if low vitamin D is linked to slower healing or com…

This study looked at how much vitamin D sulfate is in breastmilk and whether it reaches infants. Researchers collected breastmilk samples from 101 lactating mothers before and after 28 days of vitamin D supplements, and also tested infant saliva and gut contents. The goal was to …

This study looked at how common vitamin D deficiency is in people with chronic heart failure and whether giving vitamin D supplements improves their health. 91 adults with heart failure were divided into groups based on their vitamin D levels. Those with severe deficiency were ra…

This study looked at how common Metabolic Dysfunction-Associated Steatotic Liver Disease (MASLD) is among 459 adults in Turkey who are at risk due to being overweight, having diabetes, or other metabolic issues. Researchers used a special ultrasound to measure liver fat and stiff…

This study reviewed medical records of 200 adults from an endocrinology clinic to see if taking vitamin D3 supplements lowered their chances of developing Long COVID after a COVID-19 infection or getting COVID-19 after vaccination. Researchers compared patients who took vitamin D…

This completed study looked at vitamin D levels in 30 young medical residents at a hospital in Spain. Those found to have low vitamin D were given a supplement and rechecked. The goal was simply to understand how common vitamin D deficiency is in this group.

This study looked at how much vitamin D pregnant women need to reach healthy levels. 105 women at risk of deficiency took either 20 or 40 micrograms of vitamin D daily throughout pregnancy. Researchers measured their vitamin D levels and other health markers to see which dose wor…

This study measured vitamin D levels in 552 people: those on dialysis waiting for a kidney transplant and healthy kidney donors. Researchers wanted to see how common vitamin D deficiency is and whether it relates to immune function or health outcomes. The goal is to improve scree…

This completed study looked at whether vitamin D levels in the blood are linked to how severe COVID-19 gets. Researchers measured vitamin D in 1,100 COVID-19 patients in Turkey. The goal was to see if current vitamin D thresholds reflect real clinical risk. This is an observation…

This study surveyed 432 healthcare professionals in Taiwan to understand how they use bone turnover markers and vitamin D tests in their practice. The goal was to identify gaps in knowledge and guide better education and policies for managing osteoporosis. No treatments were test…

This study examined the relationship between metabolic syndrome and vitamin D levels in 549 older adults (65+). Researchers collected health questionnaires and blood samples to understand how these factors are connected. The goal was to gather knowledge, not to test a treatment.

This completed study from Turkey examined vitamin B12 and folic acid levels in 104 fibromyalgia patients before and after they started antiepileptic treatment. Researchers wanted to see if these drugs, already known to lower B12 and folate in epilepsy patients, have the same effe…

This pilot study gave 20 professional football players either a single high dose of vitamin D or a placebo before a match. Researchers measured how vitamin D levels changed in their blood. The goal was to see how exercise affects vitamin D metabolism, not to treat any disease.

This study followed 215 people newly diagnosed with HIV in Hong Kong to see how often they developed non-AIDS conditions like high blood pressure, diabetes, bone thinning, and kidney problems. Participants were on different anti-retroviral regimens, and researchers compared the r…

This study looked at how high doses of vitamin D change immune cells in 56 healthy adults over 3 months. Researchers used advanced lab tests to measure different types of immune cells before and after treatment. The goal was to better understand vitamin D's effects on the immune …

This study looked at whether low vitamin D levels in the first trimester of pregnancy are linked to developing preeclampsia later on. Researchers measured vitamin D in over 3,000 pregnant women in France. The goal was to understand how common vitamin D deficiency is and if it rel…

This completed study looked at 141 people being treated for tuberculosis (TB) to see if intestinal parasites or poor nutrition made their recovery harder. Researchers checked stool samples for parasites and measured weight gain and treatment success. Some participants received nu…

This study looked at whether vitamin D levels in the blood are related to early signs of artery hardening (atherosclerosis) in people on dialysis. Researchers measured vitamin D and used ultrasound to check artery thickness in 90 adults with kidney failure. The goal was to see if…

This completed study looked at 70 adolescent girls with PCOS and 40 healthy teens to see if vitamin D levels are linked to metabolic problems like insulin resistance. Researchers measured vitamin D, blood sugar, cholesterol, and belly fat thickness using ultrasound. The goal was …