Vitamin deficiency disorder

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 completed trial tested whether a daily supplement called Qualia Vitamin C+ can raise vitamin C levels in the blood. Thirty-six healthy adults aged 25 and older took either the supplement or a placebo for 28 days. Researchers measured blood vitamin C at the start and end, and…

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 whether taking creatine supplements can improve physical performance and body composition in people who follow a vegan diet. Twenty healthy, active vegans took either creatine or a placebo for four weeks while eating a vegan diet. Researchers measured sprint …

This study looked at whether giving thiamine (vitamin B1) for 28 days after a heart defect repair procedure helps children's hearts recover. The trial included 86 children aged 6 months to 18 years with certain heart defects. Researchers measured heart structure and function usin…

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 looked at whether taking vitamin C by mouth can safely lower the amount of erythropoietin (a drug for anemia) needed by people with end-stage kidney disease on regular dialysis. Sixty adults on stable dialysis with low iron levels and moderate anemia took part. Researc…

This study tested whether a special oral vitamin B12 supplement (Sucrosomial® B12) can raise B12 levels in people with type 2 diabetes who have low B12 due to taking metformin. Fifty adults took either the supplement or a placebo daily for 3 weeks. The goal was to see if the supp…

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 vitamin C can prevent Complex Regional Pain Syndrome (CRPS), a painful condition that can develop after a wrist fracture. Researchers enrolled 220 adults with specific types of wrist fractures and gave them vitamin C to see if it reduced their …

This study tested an eye drop (POS) in 200 adults who had poor night vision after LASIK or similar eye surgery. The goal was to see if the drops could help them see better in dim light, reducing problems like glare and halos. Participants used the drops for 15 days and had their …

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 giving vitamin C around the time of breast cancer surgery can lower pain right after surgery and months later. 204 women having a mastectomy or lumpectomy took part. Half received vitamin C, half a placebo, and pain levels were tracked for up to 6 mon…

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 study looked at whether giving a single high dose of vitamin C through an IV, along with nerve blocks, could reduce pain and help people recover faster after total knee replacement. 73 adults aged 50 to 80 took part. The researchers measured pain levels, soreness, and how mu…

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 looked at whether adding folic acid and vitamin B12 to locally made cereals can improve the nutrition, thinking skills, and mood of teenage girls in rural Ethiopia. About 472 girls aged 13-19 took part. The goal was to see if small-scale food fortification can help pre…

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 looked at whether a liposomal coating helps the body absorb more vitamin C and glutathione from a liquid supplement. Twenty healthy adults took both a regular and a liposomal version, and their blood levels were measured over 8 hours. The goal was to see if the liposom…

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 looked at how often thiamine (vitamin B1) deficiency occurs in hospitalized veterans who do not abuse alcohol. Thiamine deficiency can cause symptoms like fatigue, confusion, and weakness, and may be more common in veterans due to food insecurity and chronic illness. R…

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 study looked at how different levels of calorie shortage affect protein use in the body and how the body burns carbs during exercise. Thirty healthy adults followed a controlled diet and exercise plan. Researchers measured muscle protein and fuel use to understand how the bo…

This study tested how well vitamin A is absorbed from fortified bouillon cubes compared to an oil-based supplement. Fifty-eight healthy women consumed different vitamin A formulations in broth, and researchers measured vitamin levels in their blood. The goal is to see if adding v…

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 tested a new scoring system called BARSCORE to predict how much vitamin, mineral, and protein supplementation patients need after bariatric surgery. Researchers analyzed data from over 4,500 patients who had surgery between 2015 and 2021. The goal was to create a simpl…

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 vitamin B12 and folic acid levels in 96 people with nerve pain before and after they started taking antiepileptic drugs. The goal was to see if these medications lower important vitamin levels. No new treatment was tested; the researchers simply reviewed past…

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 study looked at whether eating beef every day for 30 days could improve thinking and visual skills in healthy young women. 80 women aged 18-40 took part, with one group eating beef and the other eating a plant-based protein. Researchers measured their performance on a 3D tra…

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 …

This study followed 1,500 women in higher-income countries who chose to take multivitamins or folic acid before or during pregnancy. Researchers tracked pregnancy outcomes like full-term birth, anemia, preeclampsia, and baby birth weight. The goal is to gather real-world data on …

This study checked vitamin C levels in 434 patients over 75 admitted to a geriatric unit. Researchers wanted to find out how many had low vitamin C and what factors put them at risk. The goal is to help doctors spot and treat this easily fixable deficiency more often.

This completed study looked at how common vitamin C deficiency is among 100 elderly people living in long-term care units. Researchers took a blood sample to measure vitamin C levels and recorded possible risk factors. The goal was to better understand why deficiencies happen in …